Add a calendar variation for a work center (M2M Advanced Scheduling only)

Article • 6/18/2026 • 4 min read

If you need to make a temporary change to the work hours for a facility or work center, you can add a variation to the base calendar and then update the schedule. Your variation overrides the base calendar for a certain shift number and facility or work center within a specified date range. You can also specify the day of the week for which the variation applies.

With the exception of changing a work day to a non-work day, each variance is applied to one shift number. The variance applies to all occurrences of that shift number within the effective date range.

To add a calendar variation for a work center

  1. Open the Calendar Variation (PSCALVAR) page.

    • Select Planning and Scheduling > P&S Production > Calendar > Calendar Variation .

    Or

    • Search for PSCALVAR or Calendar Variation in the Navigation box and then select Calendar Variation .

      The Calendar Variation (PSCALVAR) page appears.

  2. On the Toolbar, click:

    • New: To add a totally new variation.

    • Copy: To base the new variation on the currently displayed variation.

  3. Select the work center for which you want to add the variation:

    • To apply the variation to all the work centers, select the All Work Centers check box.

    • To apply the variation to a particular work center:

    You can only choose a work center associated with the selected facility.

    i. Clear the All Work Centers check box.

    ii. Click the Work Center ID lookup reference button.

    iii. Select the work center from the Lookup For Work Center window.

  4. Specify appropriate values in any of the following fields to apply the variation:

Variation types are applied to single shifts, with the exception of non-work days. For non-work days, all shifts within the effective date range are changed to non-operative.

FieldDescription
Shift NumberSpecify the shift number as 1, 2, or 3.
TypeFrom the list, select one of the following variations: Capacity Change – Override the number of simultaneous operations defined in the work center to improve delivery time or reduce lateness. Downtime – Use for machine maintenance, repairs or other occurrences of downtime. Miscellaneous – Change in capacity or normal schedule for reasons that don’t fall into one of the other categories. Non-Work Day – A day when no work is done, such as weekends and holidays. This applies to all shifts for the date range entered.
Operative – Change a shift from inactive to active. Overtime – Hours scheduled in addition to the regular shift hours defined in the base calendar. Shutdown – Entire plant is shut down for physical inventory counting or other reasons.
DescriptionType a description of the variation.
Effective DatesSpecify the dates that the variation is in effect: In – The date the variation begins. Out – The date the variation ends. Day of Week – The day of the week where you want to add the variation. Select the Any check box if the variation is not specific to a certain day.
Override Shift Data ForSchedule – Select this check box to override the schedule. Operative/Not Operative Select this check box to make the shift operative. Clear this check box if the shift should NOT be operative. Work Center Capacity – Select this check box to change the capacity for a work center associated with this shift. The Work Center Capacity section is displayed at the bottom of the window. In the Number of Sim Resources field, specify the number of simultaneous resources for the selected work center and shift.
Shift TimeIn the Start and End fields, specify the shift’s start or end times. You can view these fields if you select the Schedule check box.
BreaksThe MaxBreaksPerShift setting in the [Runtime] section of the SynchServ.ini file controls the number of breaks that display. By default, only one break is set for each shift. You can change the number of breaks for the shifts to a value not greater than 3 by modifying the MaxBreaksPerShift setting. Select the Break <n> (where n corresponds to the break number) check box for each break to include in a shift. In the Start and End fields, specify the start and end time for each break. You can view these fields if you select the Schedule check box.
  1. On the Toolbar, click Save to save the variation changes.

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