Microsoft KB Archive/74978

= Definition of Microsoft Project constraints =

Article ID: 74978

Article Last Modified on 1/18/2007

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APPLIES TO


 * Microsoft Office Project Professional 2007
 * Microsoft Office Project Standard 2007
 * Microsoft Office Project Professional 2003
 * Microsoft Office Project Standard 2003
 * Microsoft Project 2002 Professional Edition
 * Microsoft Project 2002 Standard Edition
 * Microsoft Project 2000 Standard Edition
 * Microsoft Project 98 Standard Edition
 * Microsoft Project 4.1 Standard Edition
 * Microsoft Project 4.1a
 * Microsoft Project 1.0 Standard Edition
 * Microsoft Project 3.0 Standard Edition
 * Microsoft Project 3.0a
 * Microsoft Project 4.0 Standard Edition
 * Microsoft Project 1.1 for Macintosh
 * Microsoft Project 3.0 for Macintosh
 * Microsoft Project 4.0 for Macintosh

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This article was previously published under Q74978



SUMMARY
Each constraint type in Microsoft Project can be defined as a formula using the following conventions:   ES = Early Start of the activity LS = Late Start of the activity EF = Early Finish of the activity LF = Late Finish of the activity SS = Scheduled Start of the activity SF = Scheduled Finish of the activity CD = Constraint Date



MORE INFORMATION
The following are definitions of Microsoft Project constraints.  As Late As Possible: Schedules the task as late as it can without delaying subsequent tasks. Use no constraint date.

ES=(Calculated)LS

 As Soon As Possible: Schedules the task to start as early as it can. Use no constraint date.

(Scheduled)ES=(Calculated)ES + Delay

 Finish No Earlier Than: Schedules the task to finish on or after the constraint date.

EF=CD (if Date Finish No Later Than: Schedules the task to finish on or before the constraint date.

LF=CD (if Date Must Finish On: Schedules the task to finish on the constraint date. Once selected the task will not be moveable on the timescale.

EF,LF,SF=CD

 Must Start On: Schedules the task to start on the constraint date. Once selected the task will not be movable on the timescale.

ES,LS,SS=CD

</li> Start No Earlier Than: Schedules the task to start on or after the constraint date.

ES=CD(if Date<ES)

</li> Start No Later Than: Schedules the task to start on or before the constraint date.

LS=CD(if Date<LS)

</li></ul>

For more information on Contraints, please see the &quot;Microsoft Project for Windows Reference&quot; or query on:

winproj and constraint

Additional query words: prj2000 1.0 3.0 PRJ PRJ2002 PRJ2003 PRJ2007

Keywords: kbinfo kbother KB74978

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