Abstract: An illustrative method controls changes to be made in electronic gaming machines (EGMs) that permit wagering on games. A schedule of conditions to be implemented by one or more EGMs is stored in memory. The schedule includes records containing the identity of an EGM, conditions to be implemented by the identified EGM, dates on which the conditions are to be implemented, and start and end times during which the implementation is to occur. Each record stores a priority parameter. It is determined that at least two records are to be implemented on the same date such that a time overlap in servicing the implementation of first and second conditions associated with the first and second records would result. A time sequence of execution of the first and second records is determined based on the respective priority parameters of each of the first and second records.