Pert and cpm technique pdf

Pert is best for determining three highprecision time estimates for unknown activities, whereas cpm is used for establishing a critical path with one reasonable time estimate and cost control. Cpm or critical path method is an essential algorithm in project management. The pert critical path is based on a similar concept to cpm it is the longest sequential path through the network, but is calculated using the expected or mean t e durations rather than the t m durations this means the pert critical path may follow a different sequence of activities to the standard cpm critical path. N download it once and read it on your kindle device, pc, phones or tablets. It is a statistical tool and mainly used in research projects where you cannot predict the duration of an activity. Difference between pert and cpm with comparison chart. Which of the following is an advantage of using the eoq model. Cpm is a statistical technique used to manage the activities of a project. Perty knows that this technique will provide invaluable help in answering these questions as you will see in the sections indicated in parentheses above. Difference between cpm and pert difference between. In this article, we will discuss the pert definition and demonstrate how to make a pert chart by using a pert example. Difference between pert and cpm, pert in project management refers to a planning tool that is useful for the calculation of the time involved in finishing a project realistically. In this post, you can download different best pert chart for your different project plan. Unlike pert, cpm provides only a onetime estimate, which is possible because cpm is for repetitive activities with known outcomes.

According to wikipedia, pert chart, is a statistical tool, used in project management, which was designed to analyze and represent the tasks involved in completing a given project. Instead of a highprecision time estimate as in pert, cpm time estimates are fairly reasonable. Pert and cpm are project management techniques used by organizations to manage complex projects. Pertcpm project scheduling with known activity times as in exercises 1, 2, 3 and 5 in the handout and considering timecost tradeoffs as in exercises 4 and 6 in the handout this is critical path method. It also helps in keeping track of the progress, or lack thereof, of the project. Otherwise, cpm shares the same strengths and weaknesses as the pert, and the two are often lumped together as one technique. For complex, timecritical projects, the cpmpert charts might be useful in providing a. For the sake of having a complete, selfcontained chapter on project management with pertcpm, we will present this technique again in sec. Fundamental approaches how to represent task relationships.

The cpm is ideally suited to projects consisting of numerous activities that interact in a complex manner. It is a system that helps in proper scheduling and coordination. As harold kerzner explained in his book project management, pert is. This project was notable in that it finished 18 months ahead of schedule and within budget.

Cpm chart makes these paths usually just one explicit. Pert is a project management technique, used to manage uncertain activities of a project. Project management is a systematic way of planning, scheduling, executing, monitoring, and controlling the different phases of the project, so as to obtain the goal made at the time of project creation. For complex, timecritical projects, the cpm pert charts might be useful in providing a. In the world of project management, the pert and gantt charts often get played up as the premier flow chart for project success, and while that may be true to an extent, there are. Pert became famous when it was developed and used for the management of the development of the polaris fleet ballistic missile system for the u. By 1957 they devised a technique which reduced the overhaul time to 42project. This helps you find a duration estimate of activities when there are uncertainties. The purooses of this paper are 1 to explore the need for. In december 1957, a test group was set up to apply the new technique then called the kelleywalker methods. Pert and cpm are the two networkbased project management techniques, which exhibit the flow and sequence of the activities and events. The activities underwent crashing of both the time and cost using linear programming, this paved way for the determination of critical path. It was developed during the design and construction of the polaris submarine in the usa in the 1950s, which was one of.

Jan 16, 2012 cpm critical path methodproject management technique operations research solved problem duration. Review technique pert takes the cpm network and adds distributions to represent the activity times of. In the project network each activity is represented by an arc. Pert is a technique, used to manage the uncertain task of a project. What is pert and cpm differences with comparison chart. Cpm is a statistical technique of project management that manages well defined activities of a project. There are two main techniques pertaining to project planning in use today.

Project scheduling with uncertain activity times as in exercises 7, 8 and 9 in the handout. Cpmpert or network analysis as the technique is sometimes called, developed along two parallel streams, one industrial and the other military. Navy in the 1950s to manage the polaris submarine missile program. Pert is a method to evaluate and estimate the time required to complete a task within deadlines. Cpm critical path methodproject management techniqueoperations research solved problem duration. Cpm is a method that weighs both time and cost and evaluates the timecost tradeoff for activities within a project. While both serve the same purpose, that is, the fast and effective completion of a project, they are different in many aspects such as the amount of time that they allow for each assignment. The pros and cons of using pert and gantt charts brighthub. However, pert assumes that activity durations are random variables i. Pert and cpm are techniques of project management useful in the basic managerial functions of planning, scheduling and control. Mercury, gemini, apollo work breakdown structures wbs cost and schedule tracking, configuration management. It is basically a method to analyze the tasks involved in completing a.