Critical path analysis for pmp exam

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Critical Path Analysis is an important topic for PMP exam. It is of great help for Project Managers in managing projects in real time. Since in PMP exam, questions on Critical Path Analysis will be based on understanding of the concepts so such questions can be answered with certainty unlike situational questions which can be tricky to answer sometimes. So understanding Critical Path Analysis concepts would of great help in PMP exam.

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Critical path analysis for pmp exam

  1. 1. Manish Purwar, iZenBridge
  2. 2.  How to create Network diagram? How to find out Critical Path? Finding out float of an activity Schedule compression techniques
  3. 3.  Understanding of critical path analysis & schedule compression techniques Will help in managing projects better in real life Will help in solving 10 to 15 questions in PMP exam
  4. 4.  Activity A does not have any dependencies on other activities. Activity B, can only be started once A is complete. Activity C, can be started once B is complete. Activity D can be started once A is complete. Activity E can be started once C & D are complete. Network diagram helps in visualizing the relative order and dependencies of these activities on each other.
  5. 5.  Precedence Diagramming Method (PDM) or Activity on Node (AON) • Network diagram shows dependencies • In PDM, boxes are used to show activities and arrows to show relationships. • Activities are put in the order they need to be performed • Network diagram is not concerned with when the activities will occur on the project timeline Activity Activity 2 1 End Start Activity 3
  6. 6.  Mandatory dependencies • Something MUST BE done before something else. Discretionary dependencies • There is preferred method, or order, of performing the work. External dependencies • Something outside the project must be done before a task in the project.
  7. 7.  Finish to Start (FS) : The successor can’t start before the predecessor has finished. Start to Start (SS) : The successor can’t start before the predecessor has started. Finish to Finish (FF) : The successor can’t finish before the predecessor has finished. Start to Finish (SF) : The successor can’t finish before the predecessor has started. It is rarely used. Finish to Start is most commonly used relationship. Finish to Start Start to Start Finish to FinishDig a Finish testing Plant tree Start designhole Finish documentation After 2 weeks, start coding
  8. 8. 3 weeks 8 weeks 3 6 6 14 B C 3 6 6 14 3 weeks 5 weeks 0 3 14 19Start A E End 0 3 6 weeks 14 19 3 9 D 8 14 8
  9. 9.  Longest duration path in a Network Diagram It is the shortest time to complete the project It helps to determine the focus for project management efforts Near critical path is close in duration to critical path Closer the near critical and critical paths are, the more risk project has
  10. 10. 3 weeks 8 weeks 3 6 6 14 B C 3 6 6 14 3 weeks 5 weeks 0 3 14 19Start A E End 0 3 6 weeks 14 19 3 9 D 8 14 Start, A, B, C, E, End or Start, A, D, E, End 10
  11. 11.  Total Float (slack) • The amount of time an activity can be delayed with out delaying project end date. Project Float (slack) • Amount of time project can be delayed with out delaying externally imposed project completion date. Critical path activities have zero float. Knowing float helps in better allocation of resources. If project is behind an imposed external date, then project will have negative float.
  12. 12. ES EF Forward Pass Backward LS LF Pass ES : Early Start LS : Late Start Float = LS-ES OR Float = LF-EF EF : Early Finish LF : Late FinishES and EF are calculated by Forward Pass.LS and LF are calculated by Backward Pass. 12
  13. 13. 3 6 6 14 B C 3 weeks 8 3 6 6 weeks 14 0 3 14 A E 19Start 3 weeks 5 weeks End 0 3 14 19 3 9 D 6 weeks 8 14 What is the float of Activities Float= LS-ES OR Float=LF-EF A, B, C, D and E? 13
  14. 14.  Fast Tracking • Doing critical path activities in parallel Crashing • Adding more resources to complete the activities. Reduce scope Cut quality
  15. 15. Fast Tracking Crashing Add risk  Add cost May add project  May add project management time management time Reduce scope Cut Quality  Could save cost and  Could save cost time and resources  May negatively  May increase risk impact customer satisfaction
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  18. 18. Saket BansalSaket.Bansal@iZenBridge.comM: 9910802561Web: www.iZenBridge.comLinkedIn: www.linkedin.com/in/saketbansal
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  20. 20. Presentation by – Manish Purwar Contact Manish at Mobile : +91 9910500922purwar_manish@yahoo.com

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