Condition Based Maintenance

ImageScenario:

In the course of an inspection, a system is seen to be in a condition that will require repair in the foreseeable future,  then these findings can be entered as a maintenance notification and passed on to the planning group responsible.

In SAP Plant Maintenance, we can implement a condition-based process where a requester will create a notification in SAP and prints the notification for approval. The engineering manager will then approves the maintenance request made. The maintenance planner will encode the all approved request and prepare for maintenance work order creation. The maintenance planner will now plan,schedule,release(also print) the maintenance work order for corrective maintenance. The technician(s)(mechanic or groups of mechanics) will now execute the job indicated in the maintenance work order form and his findings if any.After all the work is being done, the requester will acknowledge the repairs/work done by the technician. Then, the maintenance planner will encode all findings in SAP and performs the technical completion of the maintenance order(TECO). Finance department will run a periodic settlement in which it will post the proper charges to the cost center. After all items are being settled, they fill perform the business completion of the maintenance work order(BUCO) to close the maintenance work order.

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MAINTENANCE STRATEGY & TASK LIST

ImageThe Maintenance Strategy consist of several maintenance packages. It is the scheduling rule for preventive maintenance.

ImageThe Scheduling Indicator determines the type of scheduling :

Examples:

– time-based

  •     time-based with key date
  •     time-based as per factory calendar
  •     performance-based

A Maintenance Strategy can be assigned with Maintenance Packages.  The packages of a strategy can have different cycle units (for example month, year).  However, they must always have the same dimension (for example time).

ImageMaintenance Packages define how often certain operations are to be performed.As Part of the Maintenance Strategy,  Maintenance packages can be assigned to the operations of a task list.

The Parameters of a Maintenance Package are the following:

– Package number

   – Description

   – Cycle length

   – Unit of measurement

    – Hierarchy

When two packages fall due at the same time, the hierarchy determines which package    is carried out.

    – Offset

The offset determines the first due date of a package.

– Preliminary/follow-up buffer

The preliminary and/or follow-up buffer defines the tolerance of the envisaged start and end dates of a package.

Maintenance Task Lists can be created with preventive maintenance in mind.  The following steps are required to prepare tasks lists for use in Strategy Maintenance Plans. Where a Maintenance Strategy is defined in the Task List Header.

The different Operations of the task list are then assigned to Maintenance Packages to define the frequency at which the operations need to be carried out.

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