ProjectNoteS07 - Client Packet PERT CPM Analysis Tony...

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Client Packet: PERT / CPM Analysis Tony Polito What is PERT / CPM? PERT (Program Evaluation and Review Technique) is a logical method for organizing the "on-time, on-budget" completion of projects that was originally developed by the Navy in 1958 to manage the Polaris missile project. CPM (Critical Path Method) is a very similar technique that was developed by the RAND Corporation 1 in 1957 (and likely 'borrowed' by the Navy). There is not really any major logical difference between PERT and CPM, and most people today consider them to be the same technique. [However, some academics still refer to them as two different techniques since they do have some minor technical differences.] PERT is also logically similar to certain other planning techniques, ie, Gantt Chart s and Material Requirements Planning (MRP) as well; the similarity that is easiest to observe is that, in a sense, all three techniques count backwards from the desired finish time to plan task start times. Basically, PERT / CPM analysis is used for: 1) drawing a diagram that shows the order in which the different tasks will be done, 2) determining the minimum project duration, and 3) determining the critical path, the sequence of tasks that will make the entire project late if one of the tasks longer than planned. Constructing A PERT / CPM Diagram Paradise Resort management has hired the Windward Pool Company to install an Olympic-sized pool on their grounds. From past experience, both Paradise Resort and Windward management knows what the major tasks are that must be completed during the project, as well as how long each task takes. 1 For more about the RAND Corporation, the reader may see 1 Task Duration Prerequisite Tasks* A) Obtain building permits 2 days None B) Build concrete forms 3 days A C) Excavate pool area 4 days A D) Pour and cure concrete 6 days B, C E) Install above-ground filter pump 2 days None F) Install electrical systems 8 days E
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Client Packet: PERT / CPM Analysis Tony Polito [ *Prerequisite tasks means "can't pour concrete until we excavate," "can't excavate until we get permits," etc. To remember this, think of the "prerequisite coursework" required to sign up for a particular course. ] On behalf of Paradise Resort management, you will use PERT / CPM analysis to manage the Windward project, based on the information contained in the table. To start constructing the PERT / CPM diagram, draw a "Start" point at left. Next, find the tasks that have no prerequisites; ie, the first things to be done. Windward can start to obtain building permits (Task A), and start to install the above-ground filter pump (Task E), right away. All the other tasks require that something else must be done first. Attach Task A and Task E each directly to the "Start" point. Place the task duration (number of days) next to the Task letter; it will be used later. Next, find the tasks that can be done after obtaining the building permits (Task A) is done.
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ProjectNoteS07 - Client Packet PERT CPM Analysis Tony...

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