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Chapter 6_Sect_2 - Chapter 6 Project Networks Matt Wimble...

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Chapter 6: Project Networks 2-6-2012 Matt Wimble [email protected] 1
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Review Why estimation is important. Sources of error. Top-down Done on small projects or in beginning phases Several methods Fast & cheap Bottom-up Start with the WBS More detailed, but takes more time/cost 2
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Where we are now 3
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Where we are We have selected a project. We have found people to do the project. We have figured out what needs to be done. We have figured out time and cost of the parts of the project. What now? 4
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Intro We now know: What to do Who will do it What it will cost How long it will take??? Think about the sequence 5
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Developing the Project Plan The Project Network A flow chart that graphically depicts the sequence, interdependencies, and start and finish times of the project job plan of activities that is the critical path through the network. Provides the basis for scheduling labor and equipment. Enhances communication among project participants. Provides an estimate of the project’s duration. Provides a basis for budgeting cash flow. 6
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7 Network Diagrams A-B-C-D-E A-F-G-D-E A-F-H-J-D-E A-F-H-J-K-E K A F G E D C B H J 3 4 2 6 6 3 3 1 4 4 Tasks & Dependencies
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8 Network Diagrams A-B-C-D-E=18 slack=10 A-F-G-D-E=19 slack=9 A-F-H-J-D-E=28 slack=0 A-F-H-J-K-E=24 slack=4 Critical Path A F G E D C B H J K 3 4 2 6 6 1 3 1 9 2 PERT house case
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9 Critical Path Method How can we make the project move faster? Shorten the critical path! Critical Resource Critique Two tasks need the same resource ( a special machine, person, whatever…) you can’t do both at the same time!
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10 Critical Path Method Tasks not on the critical path can start earlier or
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