Table of Contents: How to Calculate Dates in the Critical Path Method

Overview – Date Calculation Concepts

  • Date Calculation Specifications
  • Four Basic Calculated Dates
  • Date Calculation Processes
  • Date Calculation Procedures
  • Date Calculation  Variables
  • Date Calculation Arithmetic Formulas
  • Arithmetic Formulas Identifiers
  • Arithmetic Formulas Abbreviations

How to Calculate Earliest Start

  • Condition ES|dr Earliest Start through Default Restriction(s)
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition ES|sr Earliest Start through Start Restriction(s)
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition ES|mx Earliest Start through Restriction Type Mixture
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition ES|no Earliest Start through No Restriction Linkages
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas

How to Calculate Earliest Finish

  • Condition EF|du Earliest Finish through Activity Duration
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition EF|fr Earliest Finish through Finish Restriction(s)
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas

How to Calculate Latest Start

  • Condition LS|du Latest Start through Activity Duration
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition LS|sr Latest Start through Start Restriction(s)
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas

How to Calculate Latest Finish

  • Condition LF|dr Latest Finish through Default Restriction(s)
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition LF|fr Latest Finish through Finish Restriction(s)
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition LF|mx Latest Finish through Restriction Type Mixture
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas
  • Condition LF|no Latest Finish through No Restriction Linkages
    • Date Calculation Process in Plain English
    • Date Calculation Technical Specifications and Formulas

Date Calculation Computational Rules

  • Computational Rules for Computing Earliest Start
  • Computational Rules for Computing Earliest Finish
  • Computational Rules for Computing Latest Start
  • Computational Rules for Computing Latest Finish

Convenient Reference Information

  • Dominant/Cognitive Terminology Conversion Table

Summary of Date Calculation Formulas

  • Arithmetic Formulas: Start-of-Day or End-of-Day Perspectives
  • Arithmetic Formulas: Point-of-Day Perspective

Definitions of Terms Used in this White Paper