The process that would most likely help an organization that has conducted an incident response exercise to improve performance and identify challenges is lessons learned.
Lessons learned is a process that involves analyzing an incident, reviewing what went well, identifying challenges, and making recommendations for improvement. By conducting a lessons learned process after an incident response exercise, an organization can identify areas where it needs to improve and take steps to address these areas. The lessons learned process can also help organizations identify best practices and strategies that were successful during the exercise.