In this lesson, we will discuss the use of work centers in plant maintenance.
Use and Function of Work Centers
A work center is an organizational unit that defines where and when an operation can be performed.
Work centers can represent machines or people.
Work center can be used as responsible maintenance work centers.
Work centers can be used to execute operations.
Work Center Data
Work center data is used for the following business functions:
Basic data:
Contains the description, work center category and task list usage.
Default values:
For example, a default control key.
Capacity:
Available capacity is usually entered as the standard available capacity with the specifications—factory calendar, work start and end, level of individual capacity (number of people) and operating time per capita. The available capacity can be restricted according to time, or can be organized in shifts differing from the standard available capacity.
Scheduling:
Start and end of an operation are calculated on the basis of lead times (duration of operation) The work center contains a reference to the duration field in the operation.
Costing:
Internal personnel costs are calculated on the basis of the activity types defined in Controlling. The activity types contain the assignment to an hourly rate. Activity types are assigned indirectly using a cost center, not directly to the work center.
Personnel data:
In addition to defining available capacity, people (personnel numbers from human resources) or positions can be assigned in the work center.
Note
Business Functions LOG_EAM_SIMPLICITY_19 (Web) and LOG_EAM_CI_19 (SAPGUI) offer a work center extension.
You can enter the following new default values in the work center:
Contract and Contract Item
Supplier
Purchasing Group
Purchasing Organization
Material Group Hierarchy Node
Material Group
Capacities
Available capacity refers to the capacity available within a specific period. Available capacity is determined by:
Work starting and finishing times
Length of breaks
Capacity utilization level of the capacity units
The number of individual capacity units that make up total capacity
The system saves the time worked and the daily available capacity for each work center.
The standard available capacity is valid if no interval of available capacity has been defined. The standard available capacity is defined using the shift start and finish times, break lengths, and number of individual capacity.
The system uses this data to calculate a capacity unit working time. The period for which the standard available capacity is valid has no limit.
If you have specified validity periods for available capacity, these are referred to as intervals of available capacity. This is the capacity available within a specific period of validity.
To define an interval of available capacity, you can determine shift programs that will also be valid for all work centers for a fixed time period.
Start, finish, and break times are specified for work centers in a shift.
PM-PP Integration
Work centers are not just used in maintenance but in other areas too, for example, production work centers.
If a maintenance order has been written for a machine being used as a production work center, production planners should be able to see all pending maintenance orders and the production orders for this work center on their planning boards.
To display maintenance orders for a production work center, the number of the PP work center must first be entered in the technical object's location data.
The maintenance order must also have a system condition at the header level.
