Microsoft KB Archive/63476

Proj1: Calendar Exceptions Can Affect a Task’s Duration

PSS ID Number: Q63476 Article last modified on 03-15-1995

1.00 3.00 | 1.10

WINDOWS | MACINTOSH

= SUMMARY =

A one-day task may take several days to complete, depending on the availability of the resource you assign to it. Consider the following:


 * 1) You have a task that has a one-day duration.
 * 2) The Gantt bar, and the Start and Finish dates show an eight-day duration for the task.
 * 3) You don’t have any constraint dates set, and you have removed any delay that may have been set during leveling.

A task’s duration can fall over an extended period of time if any calendar exceptions (base calendar or resource calendar) have been applied to the project.

= MORE INFORMATION =

Steps to Show Behavior

 * 1) Enter a one day task.
 * 2) From the Options menu, choose Project Info. Set the start date of the project to 6/11/90 (1 day is equal to 8 hours by default). Choose OK.
 * 3) Assign a resource to the task.
 * 4) From the Options menu, select Resource Calendar. Enter work of 2.5 hours on Monday, 1.5 hours on Tuesday, 2.5 hours on Wednesday, and 1.5 hours on Thursday. Choose OK.

The task cannot be completed in one eight-hour day because the resource that is assigned to work this task is only available for 2.5 hours on 6/11/90. Therefore, the task’s scheduled finish is extended till the end of the week to coincide with the times that the resource is available to work. To determine a task’s duration the following formula is used:

Duration = max(Resource Work / Units) To view a resource’s schedule over time, apply the Resource Usage view below the Task Sheet view. If in MS Project version 3.0, select the Resource Usage view and then select the Format menu. Choose the “Selected Task Only” option. Select the particular task in question on the Task Sheet and then view how many hours the resource is assigned to work on any given day.

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= Additional reference words: 1.0 1.00 1.1 1.10 3.0 3.00 =

Copyright Microsoft Corporation 1995.