Scimedico's comprehensive preventive maintenance procedure focuses on end user safety and optimal equipment function by following the steps below. The length of the PM depends on the condition of the equipment, but in general a PM on a grossing station takes 4-6 hours while a PM on an autopsy table takes 2-3 hours. Scheduling is flexible in an effort to avoid disrupting your lab's workflow. PM services can be scheduled on weekends, after hours, or overnight with no additional charge.