PERT and CPM are the tools that are used to manage and schedule the events and activities of the project. Both of these tools are used to manage or control time. These tools also maintain the resources and many other aspects of the project. To achieve the project goals these tools are very helpful. Both the tools are network-based which shows the flow sequence of the events and the activities. In this article, we will discuss in detail the difference between PERT and CPM. The program evaluation and review Technique (PERT) is suitable for the projects where completion time of projects is unknown. And (CPM) Critical path method is adopted where the completion time of the project is fixed.
CPM is used in the construction industry. In the construction industry, there are many types of major projects. Mostly these projects have to be completed in a certain time period or as fast as can. There are many big projects in civil construction like road projects, Hydroelectric projects, and many other big constructions of conventional sources of energy. These methods have a common approach to designing the network to find its critical path. There are used for the successful completion of the project so, they connect with each other. But there are many differences between Pert and CPM which we will discuss in this article.
Table of Contents
PERT vs CPM
It is a management technique that is used to manage uncertain activities and events of a project.
CPM is a management Method used to manage defined activities of a particular project.
|What is it||
A planning technique is used to control the project’s completion time.
CPM is a method that is used to control the cost and time of the project.
PERT gives preference to events of the project.
It gives preference to the activities of the project.
It is evolved as a research and development project.
|CPM is evolved as a construction project.|
|Main focus||Time||Trade-off and Time cost.|
|Estimates||Three times||Single time.|
|Fits for||Time estimates with high precision.||Reasonable time estimate.|
|Used for||Uncertain and unpredictable activities.||Fixed or predictable activities.|
|Crashing||The crashing concept is Not applicable||Crashing concepts is applicable.|
|Suitable for||Development and research projects.||
Civil construction and other non-research projects.
What is PERT
PERT stands for Program Evaluation and Review Technique. This technique is used to plan and identify the time taken for the completion of particular activity and event of the project. In this planning technique organizing, coordinating, scheduling, and controlling uncertain activities takes place. Charts are created in PERT which shows the graphical representation of the events and the activities. This technique studies and shows the least time is taken to complete the activity and minimum time for the completion of the projects.
This technique uses time as a variable. The part first part is to break the project into the events and the activities. After the breaking of the project next step is to make proper sequence is managed. Then time is considered for each event and the activity and then find a critical path.
History of PERT
Us Navy special projects office Missile system division developed pert back in 1957. Pert is developed during the production of the UGM-27 missile. And then it is implemented in the winter Olympics from 1965 to 1968. The main aim of this technique is to reduce the cost and time of the project.
Advantages of PERT
- In PERT after the analysis of the critical path, the different types of uncertainties can be identified.
- Pert promotes the coordination between other departments of the projects which is very helpful in the decision making.
- Its chart networks show all the activities by which it is easy to find that project will complete within the desired budget.
- Pert is time-focused.
What is CPM
CPM stands for Critical Path Method. It is a modeling technique of the project in which scheduling of project activities is done in an effective way. This model finds the maximum time taken for an activity. In CPM it Is predicted that the earliest and latest start time is possible for every activity. As the name indicates the critical path is identified because if an activity delays all activities have to be suffered.
In CPM all the activities are listed which have to perform or complete for the project completion. After that, the sequence is maintained because many activities are dependent on previous activities. Simply means some actives are on starts after the completion of the previous activity. And then estimates the time required for the completion of each activity. after that a critical path is selected. The critical path is the longest sequence of the activities that have to complete on time.
Advantages of CPM
- It identifies the dependency of the activity very effectively
- CPM identifies critical activities that are very important.
- It also accounts for the sources to be needed for the project.
- It is very helpful to determine the cost and time for the completion of the project.
Difference Between PERT and CPM
It is a project management technique in which planning, scheduling coordinating, and controlling of uncertain activities are performed.
CPM is a statical tool or method in which scheduling, planning, organizing, and controlling of defined activities are performed.
Pert manages panning and control on time management of the project.
|It controls the time and cost of the project.|
|It is evolved as a research and development project.||CPM evolved as a construction project.|
|PERT is aligned as events.||It is aligned as Activities.|
|It uses a probabilistic model.||CPM uses a deterministic model.|
|Three times estimates used in PERT.||A single time estimate is used.|
|PERT is best for high precision time estimates.||It is best for reasonable time estimates.|
|It deals with unpredictable activities.||CPM deals with predictable activities.|
|The crashing concept is Not applicable||Crashing concepts is applicable.|
|Main focus on time||Focus on cost and time.|
|Pert is best suitable for research and development projects.||CPM is best suitable for construction projects.|
Both of these techniques are very important for project management. PERT and CPM both are time management techniques. In this current time is very valuable. All of us know that time is money. With the help of these techniques, we can easily look at the progress of the project with respect to time and cost. CPM is very helpful to minimize the cost of the project in an effective way.
This is all about the difference between PERT and CPM. We hope you understand the concept. If you have any suggestions please comment on us. For more difference please go through our website.
What is PERT
PERT stands for Program Evaluation and Review Technique. This technique is used to plan and identify the time taken for the completion of particular activity and event of the project.
What is CPM
CPM stands for Critical Path Method. It is a modeling technique of the project in which scheduling of project activities is done in an effective way