Asks its way step by step to a controllable cause and stops only once an effective countermeasure is within reach.
Core question: Which controllable cause behind the symptom can the team fix with a concrete countermeasure?
Analysis methodMethod form: Analysis method. Describes how this method is used in practice.LowComplexity: low. Estimates preparation, facilitation effort, and method confidence needed.WorkshopFormat: workshop. Shows whether the method works in a workshop, asynchronously, or both.
15-30 min
2-6
Details
DevOpsCategory: DevOps. Describes the method's domain of use.
Reconstructs an incident without assigning blame and translates causes into concrete improvement actions.
Core question: Which conditions enabled the incident, and how do we reduce recurrence or impact?
Operating practiceMethod form: Operating practice. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
30-90 min
3-12
Details
DevOpsCategory: DevOps. Describes the method's domain of use.
Coordinates roles, communication, and measures during an incident so situational awareness and decisions converge.
Core question: Who commands, who works the technical problem, and how do we maintain a shared situation?
Operating practiceMethod form: Operating practice. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
As needed
4-15
Details
DevOpsCategory: DevOps. Describes the method's domain of use.
Moves incident response into a shared thread, connects alerts with commands, and keeps decisions traceable.
Core question: Which operational action benefits from shared visibility, and what controls prevent misuse?
Operating practiceMethod form: Operating practice. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
Ongoing
2-20
Details
DevOpsCategory: DevOps. Describes the method's domain of use.
Simulates realistic incident scenarios, exposes gaps in response and runbooks, and improves preparedness.
Core question: Can the system and response team safely detect and handle this bounded failure scenario?
Workshop methodMethod form: Workshop method. Describes how this method is used in practice.HighComplexity: high. Estimates preparation, facilitation effort, and method confidence needed.WorkshopFormat: workshop. Shows whether the method works in a workshop, asynchronously, or both.
Halber Tag
5-20
Details
OperationsCategory: Operations. Describes the method's domain of use.
Clarifies workflows, data, causes, and improvements by framing the problem precisely, branching possible causes, and defining countermeasures.
Core question: Which evidenced conditions explain the problem and which can we usefully change?
Mapping toolMethod form: Mapping tool. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.WorkshopFormat: workshop. Shows whether the method works in a workshop, asynchronously, or both.
1-3 h
2-8
Details
OperationsCategory: Operations. Describes the method's domain of use.
Examines an incident with a view to decisions, assumptions, and system factors, and records the resulting lessons.
Core question: What can we learn from the actual course of events without reducing the analysis to individual blame?
Operating practiceMethod form: Operating practice. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.WorkshopFormat: workshop. Shows whether the method works in a workshop, asynchronously, or both.
1-3 h
3-10
Details
OperationsCategory: Operations. Describes the method's domain of use.
Separates events, evidence, confirmed causes, and fitting actions so analysis does not turn into blame-finding.
Core question: Which evidenced system causes must change so this or a similar event does not recur?
Analysis methodMethod form: Analysis method. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
1-4 h
3-8
Details
OperationsCategory: Operations. Describes the method's domain of use.
Reconstructs a chain of events, marks factors, and derives verifiable causes and corrective actions.
Core question: Which events and conditions demonstrably contributed to the undesired outcome, and how are they linked in time and causality?
Mapping toolMethod form: Mapping tool. Describes how this method is used in practice.HighComplexity: high. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
2-6 h
3-10
Details
DevOpsCategory: DevOps. Describes the method's domain of use.
Arranges events, decisions, and delays chronologically and makes causes and lessons learned visible.
Core question: Which evidenced event sequence explains detection, response, and impact without projecting later knowledge into earlier decisions?
Mapping toolMethod form: Mapping tool. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
60-180 min
3-10
Details
OperationsCategory: Operations. Describes the method's domain of use.
A structured accident tree separates management controls, barriers, and events so serious incidents become auditable.
Core question: Which barrier, task, and management factors enabled or failed to prevent the event?
Analysis methodMethod form: Analysis method. Describes how this method is used in practice.HighComplexity: high. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
Mehrere Tage bis Wochen
2-6
Details
OperationsCategory: Operations. Describes the method's domain of use.
Hazards, targets, and failed barriers are mapped so controls can be strengthened at the point of exposure.
Core question: Which barrier should interrupt the path, how did it fail, and which independent control is missing?
Analysis methodMethod form: Analysis method. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.
2-4 h
2-6
Details
OperationsCategory: Operations. Describes the method's domain of use.
A recurring incident pattern links related cases across time so systemic causes become visible beyond one event.
Core question: Which recurring condition connects related events, and which systemic action is missing?
Mapping toolMethod form: Mapping tool. Describes how this method is used in practice.MediumComplexity: medium. Estimates preparation, facilitation effort, and method confidence needed.Workshop + asyncFormat: workshop or async. Shows whether the method works in a workshop, asynchronously, or both.