Question 46 - CISM discussion

A post-incident review (PIR) is the process of evaluating the effectiveness of the incident response after the incident has been resolved.A PIR aims to identify the strengths and weaknesses of the response process, the root causes and impacts of the incident, the lessons learned and best practices, and the recommendations and action plans for improvement1.A PIR can help an organization enhance its incident response capabilities, reduce the likelihood and severity of future incidents, and increase its resilience and maturity2.

A PIR is the best process to support the evaluation of incident response effectiveness, because it provides a systematic and comprehensive way to assess the performance and outcomes of the response process, and to identify and implement the necessary changes and improvements. A PIR involves collecting and analyzing relevant data and feedback from various sources, such as incident logs, reports, evidence, metrics, surveys, interviews, and observations.A PIR also involves comparing the actual response with the expected or planned response, and measuring the achievement of the response objectives and the satisfaction of the stakeholders3. A PIR also involves documenting and communicating the findings, conclusions, and recommendations of the evaluation, and ensuring that they are followed up and implemented.

The other options are not as good as a PIR in supporting the evaluation of incident response effectiveness, because they are either more specific, limited, or dependent on a PIR. A root cause analysis (RCA) is a technique to identify the underlying factors or reasons that caused the incident, and to prevent or mitigate their recurrence. An RCA can help an organization understand the nature and origin of the incident, and to address the problem at its source, rather than its symptoms. However, an RCA is not sufficient to evaluate the effectiveness of the response process, because it does not cover other aspects, such as the response performance, outcomes, impacts, lessons, and best practices. An RCA is usually a part of a PIR, rather than a separate process. A chain of custody (CoC) is a process of maintaining and documenting the integrity and security of the evidence collected during the incident response. A CoC can help an organization ensure that the evidence is reliable, authentic, and admissible in legal or regulatory proceedings. However, a CoC is not a process to evaluate the effectiveness of the response process, but rather a requirement or a standard to follow during the response process. A CoC does not provide any feedback or analysis on the response performance, outcomes, impacts, lessons, or best practices. An incident logging is a process of recording and tracking the details and activities of the incident response. An incident logging can help an organization monitor and manage the response process, and to provide an audit trail and a source of information for the evaluation. However, an incident logging is not a process to evaluate the effectiveness of the response process, but rather an input or a tool for the evaluation.An incident logging does not provide any assessment or measurement on the response performance, outcomes, impacts, lessons, or best practices.Reference=1: CISM Review Manual 15th Edition, Chapter 5, Section 5.52: Post-Incident Review: A Guide to Effective Incident Response3: Post-Incident Review: A Guide to Effective Incident Response : CISM Review Manual 15th Edition, Chapter 5, Section 5.5 : CISM Review Manual 15th Edition, Chapter 5, Section 5.5 : CISM Review Manual 15th Edition, Chapter 5, Section 5.4 : CISM Review Manual 15th Edition, Chapter 5, Section 5.3