Which factor is NOT considered by CPD when developing its budget?

The factor considered as not relevant to the Chicago Police Department's budgeting process is the popularity of local events. The CPD focuses on essential aspects that directly influence public safety and the operational needs of the department.

When developing its budget, the department prioritizes community needs to ensure resources are allocated in a manner that addresses the safety and concerns of residents. Crime trends play a crucial role in this process, as they dictate the allocation of personnel and resources to areas with increasing criminal activity. Officer staffing levels are also a significant consideration, as they directly impact the department's ability to effectively serve and protect the community.

In contrast, the popularity of local events does not have a direct impact on the fundamental operations of the department or its overarching mission. While managing public safety during events is important, the popularity itself does not drive budgetary decisions. Therefore, it stands out as an unrelated factor in the context of budget development for the CPD.