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Selected:Incident Timeline AnalysisARID (Active Reviews for Intermediate Designs)Barrier Analysis5 Whys
| Criterion |  DevOps Incident Timeline Analysis |  Architecture ARID (Active Reviews for Intermediate Designs) |  Operations Barrier Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | For an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable. | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 60-180 min | 2–4 h review as a planning range; preparation and evaluation additional | 2-4 h | 15-30 min |
Participantsdifferent | 3-10 | Designers, developers as users, and facilitation | 2-6 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Root cause notes, Countermeasures |
Tagsno overlap | IncidentTimelineSite Reliability Engineering | ArchitectureEngineeringFeedbackValidationTasks | Root causeSafetyIncident | Root causeIncidentLeanProblem solving |