Maintenance History (PM-WOC-MH) (SAP Library

Maintenance History (PM-WOC-MH)

Purpose

When managing technical systems, you not only want to document and support the planning of maintenance processing, you also want long-term verification documents in the form of a maintenance history.

Implementation Considerations

A long-term maintenance history (PM history) is important for the following reasons:

Recording maintenance activities

For safety reasons, it must be possible to prove that the preventive maintenance and inspections requested in the past were actually performed.

Investing in replacements

The history of a technical object contains important information for investing in replacements. In addition to costs, information on breakdown behavior and damage frequency can have a considerable influence on decisions regarding new investments.

Repetitive planning

A detailed history is highly beneficial for maintenance planning. Analyzing completed orders enables comparisons to be made between plants, technical systems, equipment or assemblies in order that conclusions may be drawn on how to create an optimum PM strategy. For the short-term planning of individual orders, you can refer to a similar historical order and thus considerably simplify and speed up the planning process for the current order.

Features

A good maintenance history must facilitate a differentiated analysis that is object-specific, function-related or task-oriented, and thereby provide answers to the following questions:

At which functional locations was a particular piece of equipment installed in recent years? What was its breakdown behavior in relation to the usage site? (object-related history)
What pieces of equipment were installed at a particular functional location in recent years? Were pieces of equipment from different manufacturers equally well suited to this functional location? (function-related history)
At which functional locations or pieces of equipment was a particular problem or type of damage established in recent years, that was repaired by installing a replacement material? (task-related history)

Structure of the Maintenance History

The maintenance history is structured largely automatically by the PM system. The data which will later make up the maintenance history is derived by maintaining the master data, entering and processing maintenance notifications, scheduling maintenance plans or executing orders.

The maintenance history comprises the following sections:

Usage history for pieces of equipment at functional locations (see The Usage History)

Notification history and technical completion confirmation documentation (see The Notification History)

Order history (see The Order History)

These three sections form the basis for a differentiated analysis. Object and function-related questions are answered from the usage history, and task-oriented questions are answered from the notification and order histories.