Calendars in Manufacturing

To plan production orders or to calculate available capacity in Manufacturing, LN needs to know the hours that are available.

In LN, calendars and availability types are used to record the availability of resources.

Lead times and production planning

In production planning, LN uses lead times to determine when an operation is finished, and when the next operation is started. To obtain reliable planning dates, the availability of resources must be taken into account. For example, a work center can be occasionally unavailable, due to weekends, holidays, or maintenance.

For more information, refer to the online manual topic Lead times in Manufacturing.

To set up calendars

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If a work center has no valid calendar for the applicable availability type, LN uses the enterprise unit 's calendar. If neither the work center nor the enterprise unit have a valid calendar, LN takes the company calendar.

If you set the Used Calendar Type field in the Routing Parameters (tirou0100m000) session to Company, LN always applies the company calendar.

Calendar codes

The following table shows how to link calendars to various resources.

To do this...	Use this session...
To define the company calendar	Companies (tcemm1170m000)
To define an enterprise unit's calendar	Enterprise Units (tcemm0130m000)
To define a work center's calendar	Work Centers (tirou0101m000)

Note

It makes no difference whether you define a work center's calendar in the Work Centers (tirou0101m000) session or the Departments (tcmcs0565m000) session. Every work center is also a department. What you enter in one session is also visible in the other.

Availability types

To do this...	Use this session...
To specify the availability type for production order planning	Routing Parameters (tirou0100m000)
To specify the availability type for Assembly Control	Assembly Control Parameters (tiasc0100m000)

To view the available combinations of calendar codes and availability types, start the Calendar Availability Types (tcccp0150m000) session. You can sort the records by calendar code or by availability type.

To view a calendar's working times, efficiency factors, and capacity percentage, use the Calendar Working Hours (tcccp0120m000) session and find the applicable calendar code and availability type.

If a planning date is not within the period defined by the start date and finish date of the selected calendar, that is, no calendar working hours are available for a specific date, LN uses the standard calendar.