Microsoft KB Archive/84764

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PRJ: Duration Calculation for Summary Tasks

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Q84764

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The information in this article applies to:


 * Microsoft Project for Windows, versions 3.0, 3.0a, 4.0
 * Microsoft Project for the Macintosh, versions 3.0, 4.0

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SUMMARY
The duration of a Summary task in Microsoft Project is calculated as a working duration based on the project base calendar.

MORE INFORMATION
The duration of a Summary task is calculated using the calendar specified in the Options Project Info dialog box. If the start and finish times of the Summary task fall outside the working hours of this calendar you may see unexpected values for the Summary task's duration.

Example

 * 1) Set the project calendar to working hours of 8:00am - 5:00pm M-F.
 * 2) Create 2 tasks and demote Task 2 to make Task 1 a Summary task.
 * 3) Assign an R1 as a resource to Task 2.
 * 4) Set the Resource Calendar for R1 to working hours of 6:00pm - 8:00pm M-F.
 * 5) Change the duration of Task 2 to 2h.

The duration of Task 2 appears as 2h, but the duration of Task 1 appears as 0h. This is because the hours for Summary Task 1 occur outside the times listed as working hours in the project base calendar.

Additional query words:

Keywords : kbusage

Issue type : kbinfo

Technology :