• Start with the normal project duration
  
• Obtain the critical path(s)
  
• Choose that activity on the critical path which is cheapest to crash.
  
• Crash that activity till either another path becomes critical or the activity is fully crashed.
  
• Determine the most economical set of activities to be crashed or relaxed to reduce the durations all critical paths.
  
• No further crashing is possible when atleast one critical path cannot be reduced.
  
• When two or more activities on any path are simultaneously crashed, some previously crashed activity on the path may be relaxed.