Final answer:
The hospital evaluates the effectiveness of emergency management planning mainly by conducting an annual review of risks from the HVA, alongside periodic reviews of the EOP's objectives and inventory.
Step-by-step explanation:
The hospital evaluates the effectiveness of its emergency management planning primarily through an annual review of risks, hazards, and potential emergencies as identified in its Hazard Vulnerability Analysis (HVA). Additionally, there is a periodic review of the objectives and scope of its Emergency Operations Plan (EOP), as well as an inventory check. Although specific review frequencies for the EOP and inventory are not mentioned in the question, it’s common practice for institutions to evaluate these components annually to ensure preparedness and effective response to emergencies.