what is cpm
critical path Method (cpm) was developed in the USA in 1957 by Morgan E. Walker and James Kelly. This method was first used by Du Pont for planning and scheduling the construction of a new chemical plant. Later this method was used for the determination of overhaul and maintenance of equipment I shut down their functions.
CPM networks are typically used for planning, scheduling and controlling repetitive types of projects (such as construction projects), where one person takes the time to complete each task required to complete the project. can make a fairly accurate assessment.
what is PERT
Program Evaluation and Review Technique (PERT) was first developed in 1958 by the USA Navy’s Office of Special Projects and a management consulting firm for the planning and control of the Polaris sub-marine missile project. PERT’s technology was developed specifically to help reduce overall project time as much as possible.
PERT networks are generally used in research and development type projects that are non-repetitive in nature or for projects where there is a lack of information regarding previous experience or knowledge to handle such projects. It is difficult to allot a fixed amount of time to do each activity.
Benefits of PERT and CPM
The various benefits of PERT/CPM methods are summarized below.
- In the network technique of planning and scheduling, one is forced to examine the entire project in advance and interact with everyone involved in the project, thereby developing a workable plan of the project. It is also forced to decide on the extent of dividing the project into smaller activities and establishing logical connections between the various activities.
- It helps in segregating the activities task wise and responsibility wise which makes it possible to coordinate the actions of different agencies involved in completing the project.
- It enables to determine appropriately correct schedules for various events and project completion based on the availability of resources (i.e. men, material, money and machines etc.).
- It allows for advance action and timely decision making to reduce the delay in completion of various events.
- It allows more flexibility in making optimum use of the resources the economy affects.
- It identifies activities critical to different stages of completion of projects which in turn enables management to focus more on fewer activities rather than placing equal emphasis on all activities at all times.
- It enables effective control over the project through periodic review and adoption of timely corrective measures to reduce slippage in project completion.