Prof.Dr. Ahmet R. Özdural – Class Notes_06 - KMU417 Project Planning and Organization – Fall 2015-2016 Semester.

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Prof.Dr. Ahmet R. Özdural – Class Notes_06 - KMU417 Project Planning and Organization – Fall Semester

Design Structure Matrix (DSM) Prof.Dr. Ahmet R. Özdural – Class Notes_06 - KMU417 Project Planning and Organization – Fall Semester

FOR DETAILS SEE:Class Notes_03 - KMU417 Project Plan&Org_WBS

Prof.Dr. Ahmet R. Özdural – Class Notes_06 - KMU417 Project Planning and Organization – Fall Semester

Gaussian Distribution

Prof.Dr. Ahmet R. Özdural – Class Notes_06 - KMU417 Project Planning and Organization – Fall Semester

Prof.Dr. Ahmet R. Özdural – Class Notes_01 - KMU417 Project Planning and Organization – Fall Semester

PERT planning involves the following steps Identify the specific activities and milestones. The activities are the tasks of the project. The milestones are the events that mark the beginning and the end of one or more activities. 1. Determine the proper sequence of activities. 2. This step may be combined with #1 above since the activity sequence is evident for some tasks. Other tasks may require some analysis to determine the exact order in which they should be performed. 3. Construct a network diagram. Using the activity sequence information, a network diagram can be drawn showing the sequence of the successive and parallel activities. Arrowed lines represent the activities and circles or "bubbles" represent milestones. 4. Estimate the time required for each activity. Weeks are a commonly used unit of time for activity completion, but any consistent unit of time can be used. A distinguishing feature of PERT is it's ability to deal with uncertainty in activity completion times. For each activity, the model usually includes three time estimates: 1.Optimistic time - the shortest time in which the activity can be completed. 2.Most likely time - the completion time having the highest probability. 3.Pessimistic time - the longest time that an activity may take. Prof.Dr. Ahmet R. Özdural – Class Notes_01 - KMU417 Project Planning and Organization – Fall Semester

1.Determine the critical path. The critical path is determined by adding the times for the activities in each sequence and determining the longest path in the project. The critical path determines the total calendar time required for the project. The amount of time that a non-critical path activity can be delayed without delaying the project is referred to as slack time. If the critical path is not immediately obvious, it may be helpful to determine the following four times for each activity: 1.ES - Earliest Start time 2.EF - Earliest Finish time 3.LS - Latest Start time 4.LF - Latest Finish time 2.These times are calculated using the expected time for the relevant activities. The earliest start and finish times of each activity are determined by working forward through the network and determining the earliest time at which an activity can start and finish considering its predecessor activities. The latest start and finish times are the latest times that an activity can start and finish without delaying the project. LS and LF are found by working backward through the network. The difference in the latest and earliest finish of each activity is that activity's slack. The critical path then is the path through the network in which none of the activities have slack. 3.The variance in the project completion time can be calculated by summing the variances in the completion times of the activities in the critical path. Given this variance, one can calculate the probability that the project will be completed by a certain date assuming a normal probability distribution for the critical path. The normal distribution assumption holds if the number of activities in the path is large enough for the central limit theorem to be applied. Prof.Dr. Ahmet R. Özdural – Class Notes_01 - KMU417 Project Planning and Organization – Fall Semester