Article ID: 74978 - View products that this article applies to.
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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<EF)
  • Finish No Later Than: Schedules the task to finish on or before the constraint date.
    LF=CD (if Date<LF)
  • 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
  • Start No Earlier Than: Schedules the task to start on or after the constraint date.
    ES=CD(if Date<ES)
  • Start No Later Than: Schedules the task to start on or before the constraint date.
    LS=CD(if Date<LS)
For more information on Contraints, please see the "Microsoft Project for Windows Reference" or query on:
winproj and constraint

Properties

Article ID: 74978 - Last Review: March 26, 2013 - Revision: 6.1
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 2000 Standard Edition
  • Microsoft Project 98 Standard Edition
  • Microsoft Project 4.1 Standard Edition
  • Microsoft Project 1.0 Standard Edition
  • Microsoft Project 3.0 Standard Edition
  • Microsoft Project 4.0 Standard Edition
  • Microsoft Project 3.0 for Macintosh
  • Microsoft Project 4.0 for Macintosh
  • Microsoft Project Professional 2010
  • Microsoft Project Standard 2010
  • Microsoft Project 2002 Standard Edition
  • Microsoft Project 2013 Professional
  • Microsoft Project 2013 Standard
Keywords: 
kbinfo kbother KB74978

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