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Templates: test-strategy.md, risk-register.md, exploratory-charter.md, bug-report.md, verification-plan.md — all with placeholder fields. Assets: risk-matrix-grid.md (5x5 P×I grid consistent with risk-based-testing.md and risk-prioritize.py), test-design-techniques-checklist.md, qa-definition-of-done.md. Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
2.9 KiB
2.9 KiB
Risk Matrix Grid (5×5 Probability × Impact)
Use this grid during risk assessment workshops to score and zone risks. This grid is consistent with risk-based-testing.md and the
risk-prioritize.pyscript.
Scoring Formula
Risk Score = Probability (1–5) × Impact (1–5)
5×5 Grid
| P \ I | 1 — Negligible | 2 — Minor | 3 — Moderate | 4 — Major | 5 — Catastrophic |
|---|---|---|---|---|---|
| 5 — Almost Certain | 5 (P3) | 10 (P2) | 15 (P1) | 20 (P0) | 25 (P0) |
| 4 — Likely | 4 (P3) | 8 (P2) | 12 (P1) | 16 (P0) | 20 (P0) |
| 3 — Possible | 3 (P3) | 6 (P2) | 9 (P2) | 12 (P1) | 15 (P1) |
| 2 — Unlikely | 2 (P3) | 4 (P3) | 6 (P2) | 8 (P2) | 10 (P2) |
| 1 — Rare | 1 (P3) | 2 (P3) | 3 (P3) | 4 (P3) | 5 (P3) |
Zone Thresholds
| Zone | Score Range | Priority Tier | Action |
|---|---|---|---|
| Critical | 20–25 | P0 | Test exhaustively; every path, every edge case |
| High | 12–19 | P1 | Test all happy paths + known failure modes |
| Medium | 6–11 | P2 | Test happy paths + common failure modes |
| Low | 1–5 | P3 | Smoke test only; defer detailed testing |
Probability Anchors
| Rating | Label | Anchor |
|---|---|---|
| 5 | Almost Certain | Will fail in production within a quarter (or has already) |
| 4 | Likely | Expected to fail within a year |
| 3 | Possible | Could fail; uncertain |
| 2 | Unlikely | Unlikely given current controls |
| 1 | Rare | Extremely unlikely; well-understood code |
Impact Anchors
| Rating | Label | Anchor |
|---|---|---|
| 5 | Catastrophic | Data loss, security breach, revenue stoppage |
| 4 | Major | Major feature outage, SLA breach |
| 3 | Moderate | Degraded experience, workaround exists |
| 2 | Minor | Cosmetic, minor inconvenience |
| 1 | Negligible | No user-visible impact |
Workshop Scoring Sheet
Record scores during the workshop, then transfer to templates/risk-register.md.
| # | Risk (short label) | P (1–5) | I (1–5) | Score | Zone | Tier |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | ||||||
| 3 | ||||||
| 4 | ||||||
| 5 | ||||||
| 6 | ||||||
| 7 | ||||||
| 8 |
Calibration Rule
If probability votes span more than 2 points:
- The facilitator asks the highest and lowest voter to state their evidence.
- Re-vote once.
- Record dissent in the register.
Test Allocation by Tier
| Tier | Hours per Risk Item (default) | Strategy |
|---|---|---|
| P0 | 8–16 | Exhaustive design + automation |
| P1 | 4–8 | Happy paths + failure modes |
| P2 | 2–4 | Happy paths + common failures |
| P3 | 0.5–1 | Smoke only |
Adjustment: multiply by 1.5× for legacy/unfamiliar code, 0.7× for well-automated areas.