Microsoft KB Archive/107442

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PRJ: Total Slack Calculated Incorrectly Using FF/SS Relationship

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Q107442

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The information in this article applies to:


 * Microsoft Project for Windows, versions 3.0, 3.0a, 4.0, 4.1
 * Microsoft Project for the Macintosh, versions 3.0, 4.0

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SYMPTOMS
Total slack may not be calculated correctly when tasks are linked using a SS (start to start) or FF (finish to finish) relationship and may cause a task to show as non critical.

WORKAROUND
To work around this problem, change the FF relationship between T1 and T2 to FS (finish to Start) with a one day lead.

Steps to Reproduce Behavior

 * 1) From the View menu, choose Task Entry.
 * 2) Enter three tasks, T1, T2, T3, and assign the tasks with a duration of 2d, 2d, and 3d, respectively.
 * 3) Select T1 through T3 and from the Edit menu, choose Link.
 * 4) Press the F6 key to activate the Task Form.
 * 5) From the Format menu, choose Predecessor and Successors.
 * 6) In the Gantt Chart, select task T1.
 * 7) In the Task Form, change the successor relationship to FF and enter a 1d lag.
 * 8) In the Gantt Chart, select T2.
 * 9) In the Task Form, change the successor task relationship to SS and enter a 1d lag.

The task T1 will calculate total slack at two days, but if the duration of task T1 is increased the end date of the project will change.

Additional query words: 3.00a

Keywords :

Issue type : kbprb

Technology : kbHWMAC kbOSMAC kbProjectSearch kbProject400Mac kbProjectMacSearch kbProject300Mac kbProject410 kbProject300 kbProject300a kbProject400