Final answer:
A lessons-learned review session takes place in the Development of Lessons Learned phase of the incident response process, aiming to analyze the incident and improve future response efforts.
Step-by-step explanation:
Conducting a lessons-learned review session would occur in the Development of Lessons Learned incident response phase. This phase is crucial for improving future response efforts and ensuring that the knowledge gained from the incident is effectively utilized. The lessons-learned review session involves analyzing observations, outcomes, and determining next steps necessary to enhance the incident response program. During the review session, the incident response team evaluates what was done well and what could be improved. The team goes over the entire incident response process, from preparation to implementation and evaluation, to identify key lessons. These lessons are then documented and shared across the organization to inform future practices and policies, ensuring continuous improvement in the face of dynamic cyber threat landscapes.