You are currently offline, waiting for your internet to reconnect

Definition of Microsoft Project constraints

Support for Office 2003 has ended

Microsoft ended support for Office 2003 on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article was previously published under Q74978
Summary
Each constraint type in Microsoft Project can be defined as a formula usingthe 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 canwithout delaying subsequent tasks. Use no constraint date.
    ES=(Calculated)LS
  • As Soon As Possible: Schedules the task to start as early asit can. Use no constraint date.
    (Scheduled)ES=(Calculated)ES + Delay
  • Finish No Earlier Than: Schedules the task to finish on orafter the constraint date.
    EF=CD (if Date<EF)
  • Finish No Later Than: Schedules the task to finish on orbefore 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 theconstraint date.
    ES=CD(if Date<ES)
  • Start No Later Than: Schedules the task to start on or before theconstraint date.
    LS=CD(if Date<LS)
For more information on Contraints, please see the "Microsoft Project forWindows Reference" or query on:
winproj and constraint
prj2000 1.0 3.0 PRJ PRJ2002 PRJ2003 PRJ2007
Properties

Article ID: 74978 - Last Review: 03/26/2013 00:42:00 - Revision: 6.1

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

  • kbinfo kbother KB74978
Feedback
or="var m=document.createElement('meta');m.name='ms.dqp0';m.content='true';document.getElementsByTagName('head')[0].appendChild(m);" onload="var m=document.createElement('meta');m.name='ms.dqp0';m.content='false';document.getElementsByTagName('head')[0].appendChild(m);" src="http://c1.microsoft.com/c.gif?"> uage in languagesListForLargeScreens track by $index -->
United States (English)
香港特別行政區 - 繁體中文
El Salvador - Español
Panamá - Español
Uruguay - Español
대한민국 - 한국어
España - Español
Paraguay - Español
Venezuela - Español
>://c1.microsoft.com/c.gif?DI=4050&did=1&t="> var varCustomerTracking = 1; var Route = "76500"; var Ctrl = ""; document.write(" d')[0].appendChild(m);" onload="var m=document.createElement('meta');m.name='ms.dqp0';m.content='false';document.getElementsByTagName('head')[0].appendChild(m);" src="http://c1.microsoft.com/c.gif?"> >