Table of Contents

3. Project Management

This chapter details the project management methodologies and organizational frameworks applied throughout the development of the project. It outlines the team's approach to structuring, executing, and monitoring the workload using an Agile framework organized into 15 distinct sprints.

It covers:

3.1. Scope

Defining the scope of CONNECT and share is essential for keeping our efforts focused on the project's objectives: reducing digital isolation and enhancing the passenger experience within the Metro do Porto. By mapping out exactly what is included in the project, we can prevent scope creep and ensure every team member understands the roadmap from conceptualization to final development.

The Work Breakdown Structure (WBS) seen in the Figure 1 ilustrates how we have divided the project into manageable phases and specific deliverables.

Figure 1: WBS

3.2. Time

The EPS teams have to complete a list of milestones to ensure project succes. The following Table 1 defines the project timeline, acting as the baseline to monitor the project's performance.

Table 1: Project Milestones
Date Description
2026/02/28 Choose and share the team's top 3 preferred project proposals
2026/03/11 Upload the “black box” System Diagrams & Structural Drafts
2026/03/18 Upload the List of Components and Materials (what & quantity)
2026/03/21 Define the Project Backlog, Global Sprint Plan, Initial Sprint Plan and Release Gantt Chart
2026/03/25 Upload System Schematics & Structural Drawings to the wiki (Deliverables) and do the cardboard scale model of the structure
2026/04/12 Upload the Interim Report and Presentation to the wiki (Deliverables)
2026/04/16 Interim Presentation, Discussion and Peer, Teacher and Supervisor feedbacks
2026/04/22 Upload 3D model video to Deliverables
2026/04/29 Upload the final List of Materials (local providers & price, including VAT and transportation)
2026/05/02 Upload refined Interim Report (based on Teacher & Supervisor Feedback)
2026/05/13 Upload packaging solution to Deliverables and Report
2026/05/27 Upload the results of the Functional Tests to the Report
2026/06/13 Upload the Final Report, Presentation, Video, Paper, Poster and Manual to Deliverables
2026/06/18 Final Presentation, Individual Discussion and Assessment
2026/06/23 Update the wiki, report, paper with all suggested corrections. Hand in to the EPS coordinator a printed copy of the poster, brochure and leaflet
2026/06/25 Demonstration of the operation of the prototype and hand in the prototype and user manual to the client

The timeline reveals a strong concentration of deliverables in April and May, particularly around the interim report and prototype development phases. This required careful sprint planning to balance documentation and technical implementation tasks.

3.3. Cost

This section details both the anticipated and actual expenditures incurred during the development of the CONNECT and share prototype. Tracking financial performance against initial projections allows the team to detect inefficiencies early, justify spending decisions, and demonstrate fiscal responsibility within the constraints set by the project brief.

3.3.1. Ideal Product Cost

This section outlines the projected costs for a full-scale, production-ready deployment of CONNECT and share across a single metro carriage: 11 handrail nodes, 7 power supply units, and 3 ceiling LED strip runs.

Table 2 presents the planned ideal product hardware costs.

Table 2: Ideal product component costs (full carriage deployment).
Component Type / Model Qty Unit Price (€) Total (€)
Microcontroller Wemos C3 mini (ESP32-C3) 11 6.20 68.20
Enclosure PA Rail (fire-resistant, 3D printed) 2 69.30 138.60
Copper tape Conductive adhesive, 20 mm × 20 m 15 8.86 132.90
Velostat Piezoresistive sheet (pressure sensor) 15 7.90 118.50
CAN Transceiver MCP2551-I/P 10 1.99 19.90
LED strip (addressable RGB) WS2813 IP65, 60 LEDs/m, 1 m 3 30.49 91.47
Power supply DC Step-Down 36–72 V to 12 V, 10 A, 120 W 6 24.67 148.02
Wiring, resistors Miscellaneous passive components 1 10.00 10.00
Power supply (5 V) 1 37.15 37.15
Delivery TBC
Total 764.74

Hardware costs per carriage total 764.74 €, with the Polyamide (PA) Rail enclosure being the single most expensive line item at 138.60 € for two units, specified due to its fire-resistance properties required for compliance with metro safety standards. No equivalent Portuguese-based supplier was identified at the time of writing, with the current source located in France. At scale, per-unit hardware costs could be reduced through bulk procurement across multiple carriage deployments.

3.3.2. Prototype Cost

All components were procured through a single supplier (Mauser) to consolidate shipping and avoid duplicate delivery charges. The 3D-printed PLA enclosure was produced using university fabrication facilities, so the line item covers filament material only. Measurement and testing instruments were obtained on loan from the university laboratory, with no associated purchase cost. Table 3 presents total list and pricing of components for the prototype. Planned cost is 2,63 € below budget ceiling (100 €).

Table 3: Planned prototype component costs.
Component Type / Model Qty Unit Price (€) Total (€)
Microcontroller Wemos C3 mini (ESP32-C3) 2 6.20 12.40
Enclosure PLA biodegradable (3D printed) 1 13.99 13.99
CAN bus cable 2×1.0mm CCA speaker wire, 10m 1 2.20 2.20
LED strip diffuser Opaque sliding diffuser for aluminium profile, 2m 1 3.27 3.27
Potentiometer 10 kΩ linear mono 1 0.49 0.49
Copper tape Conductive adhesive, 50 mm × 20 m 1 17.60 17.60
Velostat Piezoresistive sheet (pressure sensor) 2 7.90 15.80
CAN Transceiver MCP2551-I/P 2 1.99 3.98
LED strip (addressable RGB) WS2813 IP65, 60 LEDs/m, 2m 1 11.27 11.27
Barrel jack adapter DC female 5.5×2.1mm screw terminal 1 0.92 0.92
Power supply 5 VDC 4 A 20 W, 5.5×2.1mm 1 11.75 11.75
Jumper cables 120-piece Dupont set M-M/M-F/F-F, 200mm 1 3.20 3.20
Resistors Metal film 1 kΩ 0.6 W 10 0.05 0.50
Total 97.37

3.4. Quality

Quality management is needed to ensure that every deliverable meets the technical requirements and the expectations of our primary stakeholders: Porto Metro passengers and EPS coordination. Following the Project Management Body of Knowledge (PMBOK) standards, quality is managed as a continuous process rather than a final check. By defining clear metrics and verification protocols, we minimize risks and guarantee that the final prototype is safe, functional and socially impactful.

3.4.1 Quality Requirements and Metrics

To quantify the success of our work, we have established specific metrics and acceptance thresholds. As seen in Table 4 each deliverable is associated with a measurable requirement. The selected quality metrics focus on three dimensions: technical functionality, user experience, and project completeness. This ensures that CONNECT and share is not only operational, but also meaningful and usable in its intended social context.

Table 4: Quality Requirements and Metrics
WP Deliverable (WBS) Requirement Quality Metric Threshold (Acceptance)
1. Management 1.1 WBS Organize tasks Complete list of deliverables All mandatory deliverables included
1.2 Gantt Chart Control deadlines Approved schedule Finalized timeline
1.3 Global Sprint Plan Plan sprints Sprint dates Approved sprint plan
1.4 Weekly Sprint Plan Weekly tracking Weekly version Updated weekly plan
1.5 Product Backlog Distribute workload Jira All active sprint tasks assigned
1.6 Stakeholder Management Identify key people Stakeholder map Closed list of stakeholders
1.7 Risk Managemet Plan Prevent issues Response plan Critical risks under control
2. Research 2.1 State of the Art Learn from others Market analysis Similar solutions reviewed
2.2 Ethics Comply with the law Ethics report Standards met
2.3 Sustainability Environmental care Environmental report Materials analyzed
3. Design 3.1 Structural Drawings Assembly clarity Final version of drawings Approved blueprints
3.2 Black Box Diagram Define connections Block diagram Error-free logic flow
3.3 Detailed Schematics Circuit design Electronic schematic Finished and reviewed drawing
3.4 Prototype (CAD) 3D Design Final digital model Components fit correctly
3.5 Packaging Casing protection Casing material > 95% recyclable material
3.6 Cardboard Model Physical 3D “twin” Real-scale model Design matches 3D model
4. Development 4.1 List of Materials Control spending Final budget Max. 100 € total cost
4.2 Code System programming Correct operation Code runs without error
4.3 Simulations PC Testing On-screen results Approved simulation
4.4 QR APP Create the link QR Functionality QR code works correctly
5. Marketing 5.1 Flyer Create brochure Visual appeal Professional, non-pixelated design
5.2 Leaflet Explain the project Message clarity Passengers understand it instantly
5.3 Poster Design poster Impact on the Metro Visible colors and CONNECT and share logo
5.4 Marketing Video Record promotion Promo quality Fluid image and engaging message
5.5 3D Model Video Show the interior Technical fidelity Internal mechanism is clearly visible
6. Testing 6.1 Functional Tests Test operation Test results System is fully functional
6.2 User Interaction Test with people User opinion Positive user feedback
6.3 KPI Definition Set goals Success definition Project targets fixed
6.4 Data Analysis Analyze results Data charts Analyzed and clear data
7. Reporting 7.1 Interim Report Mid-term report Wiki chapters Approved draft
7.2 Interim Pres. Present progress PowerPoint presentation Presentation performed
7.3 Final Report Final report Final Wiki document All required chapters finalized
7.4 Final Pres. Final defense Project defense Final presentation performed
7.5 Paper Write article Paper format Finished article
7.6 Manual User guide Instructions for use Easy-to-follow guide

To quantify the success of our work at the product level, we have established specific metrics and acceptance thresholds for the physical and digital architecture of CONNECT and share. As seen in Table 5, each technical subsystem and deliverable is associated with a measurable requirement. The selected quality metrics focus on three dimensions: hardware stability, network communication, and software performance. This ensures that the CONNECT and share prototype is not only operationally sound under railway simulation constraints but also structurally safe and robust for real-world user interaction.

Table 5: Product Quality Requirements and Metrics
WP Deliverable (WBS) Requirement Quality Metric Threshold (Acceptance)
3. Design 3.1 Main Ceiling Housing Anchoring and PCB protection Geometric dimensional accuracy Physical parts stay within ± 1 mm of CAD model
3.2 Pole Secondary Node Isolate internal components Localized structural tension Stress below 10% of yield strength under 100N load
3.3 Enclosure Materials Comply with railway fire safety Flammability certification V-0 (UL94) / LSHF compliance under EN 45545-2
4. Development 4.1 Central Node PCB Regulate node power supply Voltage stability under full load Output voltage stays at 5.0 V ± 0.1 V
4.2 Sensor Node PCB Condition Velostat input Analog baseline voltage Absolute 0 V baseline with stable 2.2 kΩ pull-down
4.3 LED Strip Array Drive digital lighting array Signal noise margin (VIH) Amplitude ≥ 3.5 V to prevent data line flickering
4.4 CAN Bus Network Broker distributed node data Packet Delivery Ratio (PDR) ≥ 99.9% frame delivery over 1000 messages
4.5 Interaction Firmware Implement low-power states Standby current consumption Current draw dropped below < 15 mA in deep-sleep
4.6 QR Web Application Scale message database API route failure rate 0.0% error rate under 1000 concurrent write requests
4.7 AI Moderation Layer Filter toxic text entries Content approval classification 100% rejection of harmful or offensive strings
6. Testing 6.1 System Response Time Real-time ambient animation Processing & propagation delay Total latency from touch to light pulse < 100 ms
6.2 Ergonomic Usability Ensure universal accessibility Interaction intuitive rate ≥ 80% of users trigger the system in ≤ 5 seconds
6.3 System Usability Scale Validate user experience (UX) Standardized 10-item questionnaire Mean SUS score higher than the industry average (> 68)
3.4.2 Verification Sheets

While metrics define “what” we want to achieve, our verification system ensures “how” we check it. Table 6 presents a series of Yes/No questions for every deliverable. These sheets act as a final quality gate: if the answer to the question is “Yes”, the deliverable is accepted.

Table 6: Verification Sheets for Deliverables
WP Deliverable (WBS) Necessary Steps (Checklist)
1. Management 1.1 WBS Map 100% of the 35 mandatory EPS deliverables inside the work breakdown hierarchy.
1.2 Gantt Chart Ensure the project baseline duration variance stays strictly below 5% on critical paths.
1.3 Global Sprint Define and align 100% of the milestone timelines across the sprints.
1.4 Weekly Sprint Update real task progress logs in Jira every Thursday.
1.5 Product Backlog Verify that $\geq 95\%$ of all active Jira tasks have an owner and a Story Point estimate assigned before sprint activation.
1.6 Stakeholders Complete the communication mapping matrix for 100% of the identified stakeholder groups.
1.7 Risk Mgmt Allocate a dedicated mitigation or avoidance action plan for 100% of high-exposure risks (Score $\geq 60$).
2. Research 2.1 State of Art Complete a detailed competitive benchmarking study analyzing $\geq 3$ similar market solutions.
2.2 Ethics Enforce a zero-data collection architecture to ensure 100% GDPR compliance with 0 bytes of personal data stored.
2.3 Sustainability Ensure $\geq 80\%$ of the structural deployment design specifies sustainable or circular materials (Cork / PA Rail).
3. Design 3.1 Structural Finalize CAD assembly drawings including complete physical measurement annotations and $\pm 1$ mm clearances.
3.2 Black Box Close 100% of data network signals, integrating hardware timeouts and error-handling loops for open nodes.
3.3 Schematics Validate the design circuit with 0 short-circuit flags and maintain $\geq 5$ mm trace separation between voltage rails.
3.4 Prototype (CAD) Run spatial interference check to verify 0 mm volumetric overlapping between embedded electronic PCBs and the enclosure.
3.5 Packaging Construct a 100% monomaterial, 100% recyclable cork housing that can sustain a physical load $\geq 100$ kg.
3.6 Cardboard Complete a 1:1 scale physical ergonomics mock-up and secure formal approval by a unanimous team review.
4. Development 4.1 List Materials Limit total prototype materials and shipping expenditure to stay strictly under the €100 project cap.
4.2 Code Log 0 memory leaks, stack overflows, or software lockups during a continuous 24-hour runtime simulation.
4.3 Simulations Achieve a localized structural safety factor $> 2.0$ against the yield limit of the housing material under FEA load states.
4.4 QR APP Validate that 100% of scanned quick response paths trigger immediate HTTP 200 routing to the production landing URL.
5. Marketing 5.1 Flyer Verify that all visual assets are exported with a professional graphic density of at least 300 DPI.
5.2 Leaflet Measure that non-technical testers can decode the core CONNECT and share value proposition within $< 10$ seconds.
5.3 Poster Ensure the corporate CONNECT and share logo identity remains perfectly legible from a physical distance of at least 3 meters.
5.4 Marketing Video Render a full high-definition video track (1080p @ 60fps) with audio levels normalized strictly to -14 LUFS.
5.5 3D Video Display 100% of internal mechanism structures, including PCB positioning and internal CAN Bus network pathways.
6. Testing 6.1 Functional Measure a Packet Delivery Ratio (PDR) $> 99.9\%$ across the serial communication bus under 1000 iterative data frames.
6.2 User Test Achieve an excellent mean usability score $> 68$ using the standardized 10-item System Usability Scale (SUS) ($n = 11$).
6.3 KPI Def. Quantify 100% of success metrics with distinct mathematical limits, eliminating descriptive, non-measurable targets.
6.4 Data Analysis Plot 100% of test result graphs with explicit variance indicators, mean standard deviations, or error bars.
7. Reporting 7.1 Interim Report Deliver 100% of mid-term Wiki chapters completely filled with 0 empty pages before the academic deadline.
7.2 Interim Pres. Format the speech presentation structure to fit strictly within the 15-minute allocation window ($\pm 30$ seconds).
7.3 Final Report Execute automated spell-check and peer review to ensure 0 linguistic errors and 100% compliance with standard SI formatting.
7.4 Final Pres. Ensure 0 hardware resets, connection dropouts, or power failures occur during the live presentation demo.
7.5 Paper Verify 100% structural layout compliance against the mandatory IEEE / academic conference publishing template.
7.6 Manual Measure a success rate $> 90\%$ for independent, non-technical users attempting to operate the system using the step-by-step instructions.

Similarly, to verify the physical and digital architecture of the product without repeating project management milestones, Table 7 provides the specific verification checklist for the technical deliverables of CONNECT and share. These product-level questions serve as the final engineering gate before hardware deployment.

Table 7: Product Verification Sheets for Deliverables
WP Deliverable (WBS) Necessary Steps (Checklist)
3. Design 3.1 Main Ceiling Housing Do all physical fabrication dimensions of the printed enclosure stay within a ± 1 mm tolerance band when measured against the Fusion 360 CAD model?
3.2 Pole Secondary Node Does the localized structural tension remain below 10% of the material yield strength under a 100 N distributed load during SimScale FEA testing?
3.3 Enclosure Materials Do the structural housing compounds and internal wire insulation layers carry official V-0 (UL94) flammability or LSHF certifications under standard EN 45545-2?
4. Development 4.1 Central Node PCB Does the output voltage of the central node power rail maintain a stable 5.0 V ± 0.1 V output under a continuous 100% white LED brightness load?
4.2 Sensor Node PCB Does the analog sensor conditioning circuit maintain an absolute 0.00 V baseline on the ESP32 ADC pin when the Velostat grip is completely idle?
4.3 LED Strip Array Does the digital data line driven by the MCU reach a signal amplitude high enough (VIH ≥ 3.5 V) to completely eliminate high-frequency pixel flickering?
4.4 CAN Bus Network Does the communication interface achieve a Packet Delivery Ratio (PDR) ≥ 99.9% when transmitting 1000 consecutive data frames under simulated engine EMI?
4.5 Interaction Firmware Does the standby electrical current consumption of the distributed nodes drop below < 15 mA during interrupt-driven deep-sleep states?
4.6 QR Web Application Does the production database API route achieve a 0.0% failure rate when subjected to a heavy load test of 1000 concurrent write operations?
4.7 AI Moderation Layer Does the server backend automatically reject 100% of toxic, harmful, or offensive message strings with an immediate HTTP 400 bad request error?
6. Testing 6.1 System Response Time Is the total end-to-end delay between the physical touch contact and the visual LED trail ignition strictly under < 100 ms when analyzed at 240 FPS?
6.2 Ergonomic Usability Do ≥ 80% of non-technical sample passengers instinctively locate and successfully trigger the handrail interaction area in ≤ 5 seconds?
6.3 System Usability Scale Does the final calculated mean score from the 10-item System Usability Scale (SUS) survey sit comfortably above the industry baseline (> 68)?

3.5. People & Stakeholder Management

To make CONNECT and share and share a success, it is necessary to strategically manage all parties affected by the project. Following the PMBOK standards, this section identifies the key individuals and groups, defines their roles and outlines the management strategy.

3.5.1. Project Team and Internal Dynamics

We operate under a structure where all members share responsibility for project management. However, as we are a team of students with diverse backgrounds, special tasks are delegated based on individual expertise.

Using the weekly sprint plan helps us to redistribute tasks if a member is overburdened to prevent burnout and ensure quality.

3.5.2. Stakeholders Identification and Roles

Apart from the main teams, several external entities are involved in the project. In the Table 8 below, we identified them, their roles and their responsibilities.

Table 8: Stakeholders, Roles, and Responsibilities
Entity / Name Project Role Primary Responsibility
Team Members Project owners Responsible for the full development cycle and all mandatory deliverables.
Coaches EPS Supervisors Supervise, evaluate progress, and provide strategic feedback.
ISEP Faculty Advisors Offer specialized knowledge in Electronics, Sustainability, Project Management, Ethics, Marketing, among others.
ISEP Main sponsor Provides infrastructure and funding for the components (BOM).
Metro do Porto External client Provides the operational context and establishes security and infrastructure standards.
Security Department (Metro) Regulatory body Validates that the handle complies with fire, electrical, and physical safety regulations.
Metro do Porto Users Target group Live the CONNECT and share experience during their commutes and provide feedback.
Suppliers Suppliers Responsible for the timely delivery of components.
Legal Regulatory compliance Guarantees that the QR app and data management comply with European regulations.
Maintenance Team (Metro) Operational stakeholder Evaluates ease of installation, durability, and maintenance of the smart handle.
Cleaning Staff (Metro) Operational support Provides hygiene, accessibility, and resistance of the materials.

Among all stakeholders, Metro do Porto, the Security Department (Metro), and end users are considered critical, as they directly influence feasibility, approval, and user acceptance.

3.5.3. Stakeholders Management Strategy

To manage these relationships effectively, we have analyzed each stakeholder based on their Power and Interest. This analysis allows us to prioritize our communication and engagement efforts.

A) POWER/INTEREST MATRIX

The following matrix, seen in the Figure 2, categorizes our stakeholders into four quadrants to determine the necessary level of engagement for each group.

Figure 2: Stakeholder Matrix

B) ENGAGEMENT STRATEGY TABLE

While the matrix identifies the “where”, the following Table 9 defines the “how”. It establishes the specific strategy for each group and assigns a point person from the internal team to manage the relationship.

Table 9: Stakeholder Engagement Plan
ID Stakeholder Group Quadrant Management Strategy Point Person
1 Team Members Manage Closely Daily collaboration, stand-up meetings, and shared decision-making All Members
2 Metro do Porto Manage Closely Continuous alignment with their operational context and branding requirements Management Lead
3 Security Department Manage Closely Strict adherence to fire and electrical safety rules to ensure final approval Technical Lead
4 Maintenance Team Keep Satisfied Ensure the design is durable and provide a clear installation manual Hardware Lead
5 Coaches Keep Satisfied Weekly progress reports, Wiki updates, and formal meetings Management Lead
6 ISEP (Sponsor) Keep Satisfied Compliance with budget (BOM) and laboratory facility usage rules Management Lead
7 Metro Users Keep Informed Gather feedback through surveys and haptic testing to improve the UX Marketing Lead
8 ISEP Faculty Keep Informed Consulting on technical challenges (Electronics, CAD, and Marketing) Technical Lead
9 Legal Keep Informed Ensure all digital interactions and data handling follow EU regulations Legal Lead
10 Suppliers Monitor Tracking component availability and lead times for hardware integration Hardware Lead
11 Cleaning Staff Monitor Selecting materials that resist the Metro's chemical cleaning protocols Hardware Lead

3.6. Communications

To ensure CONNECT and share's success, communication is key. A communication strategy has been established to guarantee alignment between team members, supervisors and stakeholders.

3.6.1. Communication Channels and Tools

The team uses multiple tools to maintain a continuous flow of information:

3.6.2. Communication Matrix

Table 10 presents our activities and the way of realization, covering the frequency, medium, and participants involved in each communication event throughout the project.

Table 10: Communication Matrix
ActivityObjectiveFrequencyMediumParticipants
Daily Stand-upDaily tasks and identify blockers.DailyWhatsApp / Face-to-FaceTeam Members
Weekly MeetingReview weekly progress and plan next Sprint.Every ThursdayFace-to-FaceTeam & Supervisors
Sprint PlanningDefine tasks and goals for the next cycle.WeeklyJiraTeam Members
RetrospectiveEvaluate team performance and workflow.WeeklyFace-to-FaceTeam Members
Interim DemoPresent project status to coordinators.Milestone-basedPresentationTeam & Supervisors
3.6.3. Stakeholder Management

We maintain a specific communication frequency with external parties:

3.7. Risk

Risk management for CONNECT and share involves a systematic approach to identify and address potential challenges. Following the PMBOK standards, we have performed qualitative analyses to ensure that risks are treated effectively.

3.7.1. Identification of Key Risks

We have identified the following risks categorized into project and product levels.

PROJECT LEVEL RISKS:

PRODUCT LEVEL RISKS:

3.7.2. Qualitative and Quantitative Evaluation

To evaluate these risks, we adopt a 5×5 Risk Matrix seen on the Figure 3. The exposure score is calculated by multiplying Probability (1-5) and Impact (1-5).

Probability Scale: 1 (Rare) to 5 (Almost Certain)

Impact Scale: 1 (Insignificant) to 5 (Severe)

Figure 3: Risk Matrix

EXPOSURE LEVELS:

3.7.3. Risk Analysis, Handling, and Monitoring Table

The risk analysis highlights that logistical and physical risks (delivery and vandalism) pose the greatest threat to project success, like it is shown in Figure 11.

Table 11: Risk Analysis
ID Risk Description Probability Impact Score Response Management (Action) Follow-up
R1 Delivery (Component delays) 4 4 16 Avoid Purchase from local suppliers as soon as possible. Weekly tracking of shipment ID.
R2 Financial Constraint (Budget) 3 4 12 Mitigate Use recycled materials for non-critical parts. Bi-weekly review of expense log.
R3 Team Synchronicity 3 3 9 Mitigate Maintain open communication and shared task boards. Weekly stand-up progress checks.
R4 Safety Rejection (Metro) 2 5 10 Avoid Strictly follow the Porto Metro technical manuals. Regular design reviews with coaches.
R5 Vandalism 3 4 12 Mitigate Use tamper-proof screws and a robust housing. Physical integrity testing.
R6 Environmental Durability 2 4 8 Mitigate Select chemical-resistant polymers for the housing. Cleaning agent exposure tests.
R7 Cybersecurity 2 4 8 Avoid Implement encryption and secure QR protocols. Firmware penetration testing.
R8 Power Supply Instability 3 3 9 Reduce Implement deep sleep modes in the ESP32 code. Log power consumption.
R9 Ergonomic Strain 2 3 6 Reduce Create several 3D-printed prototypes for testing. User feedback surveys.
R10 Privacy Breach 1 5 5 Avoid No personal data is collected via the application. Legal checklist verification.
3.7.4. Definition of Appropriate Risk Responses

Based on the results, our strategy prioritizes Extreme and High risks. Delivery (R1) and Vandalism (R5) require immediate mitigation through early procurement and robust mechanical design.

For safety and privacy risks (R4, R10) and avoidance strategy is mandatory. We ensure the project is never at risk of legal or institutional rejection by following external regulations.

All secondary risks are monitored through iterative testing to detect any score escalation.

3.8. Procurement

The CONNECT and share procurement strategy balances regulated industrial components with cost-effective prototyping through centralized purchasing and institutional resource utilization. All components are sourced with a primary supplier and a defined fallback to ensure prototype assembly is not blocked by availability issues.

3.8.1. Sources

Three procurement streams are defined:

3.8.2. Make vs. Buy Decisions

The following Table 12 summarizes the strategic choices for key project elements.

Table 12: Make vs. Buy Decision Summary
Item Decision Rationale
Electronic Nodes Buy Wemos C3 Mini boards offer greater reliability and lower cost than custom PCBs at prototype stage.
Enclosures Make 3D printing enables rapid design iteration and custom fit to metro handrail geometry.
Sensing Material Buy Velostat is a specialized piezoresistive material with no viable in-house alternative.
Web Platform Make Custom React/Supabase implementation ensures delayed-gratification logic and anonymization requirements are precisely met.

3.8.3. Cost and Schedule Control

Expenditure is tracked against a detailed bill of materials within the program budget constraints. Component procurement is milestone-gated to ensure availability before prototype assembly begins. For each line item, the primary supplier, unit price, and quantity required are recorded in the BOM alongside the identified fallback supplier and its estimated lead time differential. Miscellaneous passive components are sourced locally where possible to reduce lead times. If a primary supplier quotes a lead time exceeding five business days at a critical milestone, the fallback supplier is activated without waiting for the primary order to fail.), both of which stock equivalent or pin-compatible parts and ship to Portugal within 3 to 5 business days.

3.9. Project Plan

As detailed in the Global Sprint Plan (see 13), the project is divided into 15 distinct sprints.

Table 13: Global sprint plan
Sprint Start Finish Working days
1 5 march 12 march 4 days of availability
2 12 march 19 march 5 days of availability
3 19 march 26 march 5 days of availability
4 26 march 2 april 5 days of availability
5 2 april 16 april 2 days of availability
6 16 april 23 april 5 days of availability
7 23 april 30 april 5 days of availability
8 30 april 14 may 4 day of availability
9 14 may 21 may 5 days of availability
10 21 may 28 may 5 days of availability
11 28 may 4 june 5 days of availability
12 4 june 11 june 5 days of availability
13 11 june 18 june 5 days of availability

The specific tasks and deliverables assigned to these periods are managed in the Project Backlog (see Table 14).

Table 14: Project backlog
Timeline Epic Ticket code Ticket title Status
Sprint 1 (5 Mar - 12 Mar) General / No Epic SCRUM-3 Communication presentation Done
Sprint 1 (5 Mar - 12 Mar) INITIATION & PLANNING SCRUM-74 Ideation discussion Done
Sprint 1 (5 Mar - 12 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-2 Blackbox diagram Done
Sprint 1 (5 Mar - 12 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-21 Drawings Done
Sprint 1 (5 Mar - 12 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-48 Structural Drafts Done
Sprint 2 (12 Mar - 19 Mar) FINAL DELIVERABLES SCRUM-26 Flyer Done
Sprint 2 (12 Mar - 19 Mar) General / No Epic SCRUM-75 Selection of Materials & Components V2 In Progress
Sprint 2 (12 Mar - 19 Mar) General / No Epic SCRUM-76 Presentation for Teachers Done
Sprint 2 (12 Mar - 19 Mar) INITIATION & PLANNING SCRUM-42 Backlog, Gantt and Sprint Plan Done
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-55 Background and Related Work In Progress
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-57 Marketing Plan In Progress
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-58 Eco-Efficiency Measures for Sustainability In Progress
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-73 Canvas Done
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-79 4.1 Introduction To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-80 4.2 Business Idea Formulation To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-81 4.3 Business Model To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-82 4.4 Market Analysis To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-83 4.5 SWOT Analysis To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-84 4.6 Strategy To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-85 4.7 Marketing Programs To Do
Sprint 2 (12 Mar - 19 Mar) INTERIM REPORT-WIKI CONTENT SCRUM-86 4.8 Conclusion To Do
Sprint 2 (12 Mar - 19 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-49 Selection of Materials & Components v1 Done
Sprint 2 (12 Mar - 19 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-50 Name and Logo Done
Sprint 3 (19 Mar - 26 Mar) General / No Epic SCRUM-77 Ethics Scandal PowerPoint To Do
Sprint 3 (19 Mar - 26 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-51 Detailed Schematics To Do
Sprint 3 (19 Mar - 26 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-52 Structural Drawings To Do
Sprint 3 (19 Mar - 26 Mar) SYSTEM DESIGN & DRAWINGS SCRUM-53 Cardboard Model To Do
Backlog CLOSING SCRUM-63 Update Wiki & MS Teams (Final Deliverables) To Do
Backlog FINAL DELIVERABLES SCRUM-20 Final List of Materials & Components To Do
Backlog FINAL DELIVERABLES SCRUM-23 Code To Do
Backlog FINAL DELIVERABLES SCRUM-24 3D Model Video To Do
Backlog FINAL DELIVERABLES SCRUM-25 Flyer Done
Backlog FINAL DELIVERABLES SCRUM-27 Packaging Solution To Do
Backlog FINAL DELIVERABLES SCRUM-28 Manual To Do
Backlog FINAL DELIVERABLES SCRUM-29 Simulations To Do
Backlog FINAL DELIVERABLES SCRUM-32 Final Report To Do
Backlog FINAL DELIVERABLES SCRUM-33 Final Presentation To Do
Backlog FINAL DELIVERABLES SCRUM-34 Paper To Do
Backlog FINAL DELIVERABLES SCRUM-35 Poster To Do
Backlog FINAL DELIVERABLES SCRUM-36 Video To Do
Backlog FINAL DELIVERABLES SCRUM-62 Selection of Local Providers To Do
Backlog General / No Epic SCRUM-30 Interim Report To Do
Backlog INTERIM REPORT-WIKI CONTENT SCRUM-54 Introduction To Do
Backlog INTERIM REPORT-WIKI CONTENT SCRUM-56 Project Management To Do
Backlog INTERIM REPORT-WIKI CONTENT SCRUM-59 Ethical and Deontological Concerns To Do
Backlog INTERIM REPORT-WIKI CONTENT SCRUM-60 Project Developments To Do
Backlog INTERIM REPORT-WIKI CONTENT SCRUM-61 Conclusions To Do
Backlog PROTOTYPE DEVELOPMENT SCRUM-69 Figma Designs for Message Application To Do
Backlog PROTOTYPE DEVELOPMENT SCRUM-78 Message Application code To Do
Backlog TESTING SCRUM-66 Functional testing To Do
Backlog TESTING SCRUM-67 Non-functional testing To Do
Backlog TESTING SCRUM-68 User-acceptance testing To Do

The high-level distribution of Epic responsibilities across the timeline is summarized in the Initial Sprint Plan (see Table15).

Table 15: Initial sprint plan
Sprint Start Finish Epics Responsible
1 5 march 12 march INITIATION & PLANNING All
2 12 march 19 march INITIATION & PLANNING; SYSTEM DESIGN & DRAWINGS; FINAL DELIVERABLES All
3 19 march 26 march INITIATION & PLANNING; SYSTEM DESIGN & DRAWINGS All
4 26 march 2 april SYSTEM DESIGN & DRAWINGS; INTERIM REPORT & PRESENTATION All
5 2 april 9 april INTERIM REPORT & PRESENTATION All
6 9 april 16 april PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
7 16 april 23 april PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
8 23 april 30 april PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
9 30 april 7 may PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
10 7 may 14 may PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
11 14 may 21 may PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
12 21 may 28 may PROTOTYPE CONSTRUCTION; FINAL DELIVERABLES All
13 28 may 4 june FINAL REPORT, PRESENTATION & VIDEO All
14 4 june 11 june FINAL REPORT, PRESENTATION & VIDEO All
15 11 june 18 june FINAL REPORT, PRESENTATION & VIDEO ; FINAL DELIVERABLES All

Lastly, the visual dependencies and duration of these tasks are illustrated in the Gantt Chart (see Figure 4).

 Gantt chart
Figure 4: Timeline for this project (Gantt chart)

3.10. Sprint Outcomes

Sprints 1 & 2 were not managed in Jira and there were no specific tasks to be done. However, the idea of the project had been forming before Sprint 3 and some outcomes were achieved such as:

3.10.1 Sprint 3 Outcome

As illustrated in Figure 5, the Sprint 3 Burndown Chart captures our very first agile tracking cycle and the initial progress trends of the team.

Figure 5: Sprint 3 Outcome

In Sprint 3 we consolidated both the technical foundation of the project and the supporting documentation. The team completed all planned issues in Jira, with no carry‑over work. Key outcomes included updated structural drawings and schematics (V2), the cardboard model, and a refined selection of materials and components. We also advanced the digital side with Figma designs for the message application and progressed written deliverables such as the background/related work and eco‑efficiency measures. Routine work like daily meetings, the sprint retrospective, and logbook updates was completed, ensuring the project stayed aligned and well documented.

3.10.2 Sprint 4 Outcome

To analyze our development velocity during the middle phase of development, Figure 6 outlines the task execution line and workload behavior for Sprint 4.

Figure 6: Sprint 4 Outcome

In Sprint 4 we advanced both the written deliverables and the technical foundations of the CONNECT and share system. The team completed the core report chapters (Introduction, Background & Related Work, Marketing Plan, Eco‑Efficiency Measures, Ethical & Deontological Concerns) and updated the project wiki start page, ensuring the documentation is coherent and aligned with the project vision. On the technical side, we produced Structural Drawings V3 with measurements, Detailed Schematics V3, a general software flow chart, and updated the list of materials and components, while also finalizing the clickable web app prototype and the design system/brand guidelines. Routine process tasks such as daily meetings, the sprint retrospective, and logbook updates were completed, keeping communication and traceability strong. Some higher‑effort items like Chapter 3 – Project Management, Chapter 7 – Project Developments, and the Interim Presentation remained in progress and will be continued in Sprint 5.

3.10.3 Sprint 5 Outcome

The tracking data exported from Jira in Figure 7 displays the evolution of our remaining effort during Sprint 5, highlighting a noticeable stagnation phase.

Figure 7: Sprint 5 Outcome

3.10.4 Sprint 6 Outcome

In Figure 8, the generated sprint report uncovers a pronounced flatline pattern that dominated the majority of our Sprint 6 tracking timeline.

Figure 8: Sprint 6 Outcome

3.10.5 Sprint 7 Outcome

Figure 9 presents the real-world metrics from our seventh sprint iteration, demonstrating how technical challenges affected our daily work logging.

Figure 9: Sprint 7 Outcome

3.10.6 Sprint 8 Outcome

The graphic evaluation provided in Figure 10 highlights the operational changes made during Sprint 8, where a downscaled scope strategy was implemented.

Figure 10: Sprint 8 Outcome

3.10.7 Sprint 9 Outcome

As detailed in Figure 11, the sprint history reveals a more progressive and steady downward burn of tasks, indicating a maturation of team logging discipline.

Figure 11: Sprint 9 Outcome

3.10.8 Sprint 10 Outcome

Figure 12 details the workload distribution and steep final steps that occurred during the closing phase of Sprint 10 as assembly deadlines neared.

Figure 12: Sprint 10 Outcome

3.10.9 Sprint 11 Outcome

The final metrics dashboard visualized in Figure 13 displays our optimal burndown alignment, matching our most efficient development cycle.

Figure 13: Sprint 11 Outcome

3.10.10 Sprint 12 Outcome

Figure 14 presents the tracking metrics and burndown trend from Sprint 12, highlighting the critical challenges faced by the team during the late-stage integration phase.

Figure 14: Sprint 12 Outcome

3.11. Sprint Evaluations

Sprint evaluations and retrospectives are fundamental to the team’s Agile workflow, allowing for continuous process improvement. Starting from Sprint 3, the team implemented formal retrospective sessions to identify bottlenecks and refine internal methodologies.

3.11.1. Sprint 3 Retrospective

In this sprint, the focus was on establishing the technical foundation. The retrospective revealed significant gaps in task granularity and time management.
Retrospective Summary:

3.11.2. Sprint 4 Retrospective

Following the action plan from the previous sprint, Sprint 4 showed a marked improvement in organization and team morale.

Retrospective Summary:

3.11.3. Sprint 5 Retrospective

Sprint 5 centered on the team's first formal presentation. The retrospective highlighted strong collaboration and timely delivery, but identified gaps in presentation rehearsal and logistics.

Retrospective Summary:

3.11.4. Sprint 6 Retrospective

Sprint 6 focused on production of key deliverables, including the promotional video, 3D model, and marketing materials. The retrospective reflected strong output but flagged recurring carry-over as an area for improvement.

Retrospective Summary:

3.11.5. Sprint 7 Retrospective

Sprint 7 saw the completion of several key deliverables and continued web app progress. The retrospective identified procrastination as the main obstacle to a smoother workflow.

Retrospective Summary:

3.11.6. Sprint 8 Retrospective

Sprint 8 we had strong team cohesion and worked efficient with tasks. The retrospective identified no significant areas for improvement.

Retrospective Summary:

3.11.7. Sprint 9 Retrospective

Sprint 9 delivered comunication/visual material that received good feedback and continued web app progress, but exposed workflow gaps tied to component delays and tasks that carried over several sprints.

Retrospective Summary:

3.11.8. Sprint 10 Retrospective

Sprint 10 was a stable sprint with most tasks completed as expected. The team acknowledged the need to pick up the pace as the project deadline draws closer.
Retrospective Summary:

3.11.9. Sprint 11 Retrospective

Sprint 11 featured a successful marketing pre-presentation and good team communication. Carrying over tasks remained as an ongoing challenge.
Retrospective Summary:

These management pillars are put into practice through a cycle of continuous planning and execution. The Sprint outcomes and evaluations documented here reflect our ongoing effort to refine the workflow and hit project milestones. With the management structure in place, the focus now shifts to the Marketing Plan to define the project's market strategy and value proposition.