Project Management • • • • • Introduction to project management Critical path method (CPM) Crashing Uncertain activity durations Reading: Page 760 – 794 Project • Project: – A special type of process / transformation – A series of related jobs directed toward some major output – Require time and resources – Examples • MS Windows 2000‚ Fund raising‚ Preparation for a private party‚ Building a new airport… The Campus Wedding Reserve Church (1) Church Notice (17) 1 Decorate Church
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activity times: 1. Complete the chart below (Round numbers to the second decimal place). Job No. Immediate Predecessors Times (weeks) Expected Time σ2 To Tm Tp A - 2 2 2 B A 1 2 3 C A 2 4 6 D B‚ C 1 3 5 E D 2 3 4 F C‚ D 1 2 3 G E‚ F 2 4 6 H C‚ F 1 1 1 I F‚ G‚ H 2 2 8 2. Construct the network diagram / Determine ES/EF &LS/LF. 3. Determine the critical path(s). 4. Identify activities that have slack times and also indicate how long the slack times are. 5.
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sequence of the activities. Construct a network diagram. Estimate the time required for each activity. Determine the critical path. Update the PERT chart as the project progresses. KEYWORDS Program Evaluation and Review Technique (PERT)‚ nodes‚ PERT event‚ predecessor event‚ successor event‚ PERT activity‚ Optimistic time‚ Pessimistic time‚ Most likely time‚ Expected time‚ Critical Path‚ Lead time‚ Lag time‚ Slack. OBJECTIVE The main objective of PERT is to facilitate decision making and to reduce
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may be delay without influencing the start of another activities. Other project management systems. In response to the limitations of Gantt charts‚ two other scheduling control systems were developed in the 1950’s. These systems are known as Critical Path Methods (CPM) and Program Evaluation and Review Techniques
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Activity Immediate Predecessor Time (Weeks) A -- 3 B A 2 C A 4 D A 4 E B 6 F C‚D 6 G D‚F 2 H D 3 I E‚G‚H 3 a. Draw the network diagram. b. What is the critical path? c. Suppose you want to shorten the completion time as much as possible‚ and you have the option of shortening any or all of B‚C‚D and G each one week. Which would you shorten? d. What is the new critical path and earliest completion time? Question 3a Question 3b From the above project network‚ five possible paths found in that project
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the Critical Path Method network-planning model was used. The Critical Path Method is a procedure for scheduling a project in which activity times are known so single time estimates are used. The critical path of activities is the sequence of activities in the project that form the longest chain in terms of their time to complete. This means that if one of the activities on that critical path is delayed‚ then the whole project is delayed. There are four main steps to the Critical Path Method
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described in the case. Q2: How long will the project take to complete? And which activities are critical? After drawing the structure of project plan‚ we have to research the duration while the project take to complete. We will find the activities that must be completed on time for the project to complete on due date. We know all of activities’ required time and immediate predecessors‚ finding out the longest sequences of activities in a project plan. For example‚ from the started
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14: Paint interior‚ 3 days; Lay carpet‚ 3 days; Install wood trim‚ 16 days. Notice that all tasks start on the project Start date. You will learn in later tutorials how to change this. 5. Open the task form below the Gantt chart. View the Predecessors & Successors for tasks 6‚ 7‚ and 8. Close the Details view. Task 6 Task 7 Task 8 6. Change the duration for the first two tasks—Secure financing and Purchase lot—to 4 days each. 7. Display the Timescale dialog box. Change
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Domain Class Diagram Fig. 11 Domain Class Diagram Design Class Diagram Fig. 12 Design Class Diagram Critical Path Method (CPM) Diagram
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each path in the network‚ and indicate the critical path. Activity Time (weeks) 1 2 5 1 3 4 2 4 3 3 4 6 2. Construct the CPM network described by the following set of activities‚ compute the length of each path in the network‚ and indicate the critical path. Activity Time (weeks) 1 2 3 1 3 7 2 4 2 3 4 5 3 5 6 4 6 1 5 6 4 3. Construct the CPM network described by the following set of activities‚ compute the length of each path in the network‚ and indicate the critical path. Activity
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