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Project Scheduling

Project Scheduling. IOM580 Hiroshi Ochiumi. PERT and CPM. Late 1950s Program Evaluation and Review Technique (PERT) U.S. Navy, Booz-Allen Hamilton, and Lockeheed Aircraft Probabilistic activity durations Critical Path Method (CPM) Dupont De Nemours Inc. Deterministic activity durations.

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Project Scheduling

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  1. Project Scheduling IOM580 Hiroshi Ochiumi

  2. PERT and CPM • Late 1950s • Program Evaluation and Review Technique (PERT) • U.S. Navy, Booz-Allen Hamilton, and Lockeheed Aircraft • Probabilistic activity durations • Critical Path Method (CPM) • Dupont De Nemours Inc. • Deterministic activity durations

  3. The Language of PERT/CPM • Activity • task or set of tasks • use resources • Event • state resulting from completion of one or more activities • consume no resources or time • predecessor activities must be completed

  4. The Language of PERT/CPM • Milestones • events that mark significant progress • Network • diagram of nodes and arcs • used to illustrate technological relationships • Path • series of connected activities between two events

  5. The Language of PERT/CPM • Critical Path • set of activities on a path that if delayed will delay completion of project • Critical Time • time required to complete all activities on the critical path

  6. Building the Network • AOA Network • AON Network

  7. Example 1

  8. AON Network

  9. AOA Network

  10. Example 2

  11. Critical Path/Time • Determine ES and EF times for each activity • Determine LS and LF times for each activity • Slack = LST – EST = LFT – EFT

  12. Example 2

  13. Example 3

  14. AON Network

  15. Critical Path and Time

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