2.3 Master Maintenance Schedule
Preventive maintenance work needs to be planned which sets out the generation of preventive works. Specifying the timing of
the first issue of a routine as a work order is accomplished by Master Maintenance Schedule (MMS) worksheets.
In developing the MMS, scheduler defines the first release of each routine, which will automatically allocates the subsequent
dates when the routine is due. The master PM scheduler provides a forecast of all work-orders for the planned PMs. The
scheduler can then check the workload for each trade or the total workload for the preventive maintenance for the entire site or
a particular department. These will help the scheduler to examine the effectiveness of the scheduling process and to avoid
congestion in any particular week, during the busy period of the year or for a specific work group.
An Implementation Plan for the go-live of the PM system is also an important part of a well-defined MMS. It is important to
define a smooth path from breakdown maintenance to a planned maintenance system. It will provide sufficient information for
developing a smooth transition in the plant considering available resources and existing workloads on maintenance crews.