PM7_24MAR10 - Chapter Resource Management 1...

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1 Chapter  Resource  Management
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    2 Introduction to Resource Management Resources should be chosen for maximum flexibility, e.g. flexibility of amount,  flexibility of available date Up to a certain point, the more of a particular resource is used, the less expensive it is per period or per unit, due to economies of scale In many situations, the marginal contribution of a resource decreases with usage Resources are organizational assets, so using them may have implications  elsewhere (“opportunity cost”) The organization has better control over its own resources than those which are  borrowed or leased
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    3 Resource Leveling and Allocation  Resource Leveling : Reschedule the  noncritical  tasks to smooth  resource requirements over time (without increasing project  duration) Resource Allocation : Minimize project time or cost objective subject  to meeting resource availability constraints  Both the above problems (especially resource allocation) are difficult  to solve, so for large projects we are not able to find  optimal   solutions (using either MS Project or Excel)  But some good  heuristic   priority  approaches help make better  decisions
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    4 Resource Leveling and Allocation  Three types of resources: Renewable resources :  “renew” themselves at the  beginning of each time period (e.g., workers) Non-Renewable resources :  can be used at any rate  but constrained on total amount used over time  (e.g., a budget limit) Doubly constrained resources :  both renewable and  non-renewable (e.g., money under both total budget  and unit cost constraints)
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    5 Resource Leveling Example Duration  t j
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    6 Resource Leveling Example:  Early Start Schedule The maximum number of workers needed is 21. A A A B B C C C C C C C C C D D D D D E E E F F G G G G G
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    7 Resource Leveling Example:  Late Start Schedule A A A B B C C C C C C C C C D D D D D E E E F F G G G G G Now the maximum number of workers needed is only 16.
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    8 Resource Leveling Discussion Can the maximum number of workers needed be reduced below 16  without  increasing the project duration above 13 weeks? The schedule of tasks A, D, and G cannot be changed, because they  are critical If task E starts in week 5 or earlier, then tasks C, D and E are all  performed during week 5 Therefore, if the project is not to be delayed, at least 2+10+4=16  workers are needed
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PM7_24MAR10 - Chapter Resource Management 1...

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