A disaster recovery plan (DRP) test is a simulation of a disaster scenario to evaluate the effectiveness and readiness of the DRP. The greatest inherent risk when performing a DRP test is the disruption to the production environment, which could cause operational issues, data loss, or system damage. Therefore, it is essential to plan and execute the DRP test carefully, with proper backup, isolation, and rollback procedures. Poor documentation, lack of communication, and lack of coordination are also potential risks, but they are not as severe as disrupting the production environment. References = CISM Review Manual 15th Edition, page 253; CISM Review Questions, Answers & Explanations Database - 12 Month Subscription, QID 224.

The greatest inherent risk when performing a disaster recovery plan (DRP) test is disruption to the production environment. A DRP test involves simulating a disaster scenario to ensure that the organization's plans are effective and that it is able to recover from an incident. However, this involves running tests on the production environment, which has the potential to disrupt the normal operations of the organization. This inherent risk can be mitigated by running tests on a non-production environment or by running tests at times when disruption will be minimized.