IDA-05 Risk and Safety Case
1. Purpose
Capture project risks, protocol hazards, and mitigations with verification evidence.
2. Risk Register Template
For each risk:
- Risk ID
- Description
- Impact (correctness/interoperability/performance/schedule)
- Likelihood
- Owner
- Mitigation
- Verification method
- Residual risk
- Status
3. Initial High-Priority Risks
- R-01: Spec misinterpretation causing non-compliant behavior
- R-02: Sequence/state edge-case defects under wrap/retransmit
- R-03: Interop mismatch at wire-format boundaries
- R-04: Late-stage performance regressions
- R-05: Documentation gaps reducing usability score
Risk selection rationale:
- These risks are prioritized because they have the highest probability of reducing final score and causing late-stage schedule disruption.
4. Safety and Reliability Arguments
- Deterministic state machine with explicit guards
- Graceful rejection of malformed protocol units
- Recovery logic for communication loss and resynchronization
- Evidence-backed confidence from stress and interoperability tests
Safety argument rationale (fill this section):
- For each argument, record supporting evidence and why it is sufficient.
- Identify remaining uncertainty and planned closure actions.
5. Failure Mode Review Cadence
- Weekly risk review
- Gateway-end risk sign-off
- Post-defect failure mode update after any severity-1/2 bug
6. Exit Criteria for Risk Closure
- Mitigation implemented
- Verification evidence available
- No open high-risk items without approved workaround
Closure rationale:
- Closure requires both mitigation and objective proof to prevent administrative closure without technical confidence.
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