In NIMS, resource inventorying is associated with preparedness activities conducted:

Resource inventorying in the context of the National Incident Management System (NIMS) is an essential aspect of preparedness activities, which is primarily focused on actions taken before an incident occurs. This process involves identifying, categorizing, and documenting resources that may be needed during an emergency response. Effectively inventorying resources helps to ensure that response teams have the necessary supplies, personnel, and equipment ready and available when an incident happens.

By engaging in resource inventorying ahead of time, organizations can assess their capabilities, identify gaps, and make informed decisions about training, resource allocation, and investments in preparedness. This proactive approach is crucial for maintaining readiness and improving response times in the event of a disaster or emergency situation.

In contrast, the other timing options relate to phases of incident management after an emergency is already underway or concluded, which is outside the scope of resource inventorying as a preparatory measure.