Risks and Technical Debts¶
Insert SFMEA here
1. Description of the Process/System¶
Overview of the Entire Product:
- Temperature Measurement and Transmission:
- Involves temperature sensors, RTC modules, Arduino, SD module/card, and access to online weather data
- Data Storage:
- Utilizes a database for storing temperature data
- Analysis/Evaluation:
- Data is analyzed and evaluated, with results visualized via website or analytics tools
Components Involved:
- Temperature Measurement:
- Temperature sensors, RTC modules, Arduino, SD module/card, online weather data availability
- Temperature Transmission:
- Network availability, server infrastructure
- Data Storage:
- Database systems
- Visualization/Analysis:
- Data availability, website, analytics platforms
Process Aspects:
- Data flow throughout the system
- Handling of failure and recovery scenarios
2. Error Analysis¶
Possible Errors¶
- Incorrect or missing data
- Unavailability of services or functions (e.g., website, Grafana)
Causes¶
- Compatibility issues due to software or hardware updates
- Security vulnerabilities
- Temperature Measurement:
- Sensor errors (e.g., incorrect calibration, hardware malfunction, sensor failure, power supply issues, incorrect interval configuration)
- Misassignment of data (e.g., north/south confusion)
- Weather service outages
- Data Transmission:
- Network outages or connectivity issues
- Duplicate data transmission
- Data Storage:
- Incorrect or duplicate entries
- Database corruption or failure
- Visualization/Analysis:
- Website or Grafana unavailability
- Incorrect data presented for visualization
Impacts¶
- Gaps in data analysis
- Misinterpretation or incorrect assessment of results
- Lack of long-term evaluation or comparison basis
- No or limited access to collected data
3. Evaluation of Errors and Consequences¶
| Error | Probability of Occurrence | Severity | Probability of Detection | Risk Priority Number |
|---|---|---|---|---|
| Sensor error | 2-3 (unlikely) | 8-9 (severe) | 2-3 (inevitable detection) | 32-81 |
| Misassignment of data | 3 (low) | 6-7 (disturbance) | 5-6 (only detected during targeted checks) | 90-126 |
| Weather service outage | 1 (almost impossible) | 8-9 (severe) | 2-3 (inevitable detection) | 16-27 |
| Network outage | 2 (unlikely) | 8-9 (severe) | 2-3 (inevitable detection) | 31-45 |
| Duplicate transmission | 2 (unlikely) | 2 (irrelevant) | 5-6 (only detected during targeted checks) | 20-24 |
| Incorrect/missing entries | 2-3 (unlikely) | 8-9 (severe) | 3-4 (high probability of detection) | 48-108 |
| Database corruption | 2-3 (unlikely) | 8-9 (severe) | 3-4 (high probability of detection) | 48-108 |
| Website/Grafana malfunction | 1 (almost impossible) | 8-9 (severe) | 2-3 (inevitable detection) | 16-27 |
| Power outage | 3 (low) | 8-9 (severe) | 2-3 (inevitable detection) | 48-81 |
4. Corrective actions¶
| Error | Risk Priority Number | Mitigation Measure |
|---|---|---|
| Sensor error | 32-81 | - |
| Misassignment of data | 90-126 | Implement data validation and labeling checks |
| Weather service outage | 16-27 | Use fallback data sources |
| Network outage | 31-45 | Local storage of data on the Arduino |
| Duplicate transmission | 20-24 | - |
| Incorrect/missing entries | 48-108 | Input validation |
| Database corruption | 48-108 | - |
| Website/Grafana malfunction | 16-27 | Monitor uptime |