Project management entails planning, scheduling, executing, monitoring, and controlling different projects in a business organization. It uses both PERT and CPM techniques.
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The article provides detailed insight into the difference between PERT and CPM with examples for easier understanding. Let’s jump into the topic.
What is PERT?
PERT stands for project evaluation and review technique. The technique helps to understand planning, arranging, scheduling, coordinating, and governing the project.
PERT is commonly used in events and activities. It was developed in the 1950s with the aim of reducing cost and time for production.
Advantages of PERTIdeal for planning large projectsHelp to show the critical path in a clear wayHelp to provide progress and completion report of the projectHelp improve communication between different departmentsHelp identify risks linked to the project
Disadvantages of PERT
Time-consuming techniqueTend to entail subjective analysisPrediction tend to be inaccurateThe method is generally expensive
What is CPM?
CPM stands for the Critical Path Method. This is a statistical method used to manage the activities of a project. Besides that, it helps reduce time and differentiate between critical and non-critical tasks.
Advantages of CPMHelp recognize critical activitiesImprove the productivity of a business organizationManage resources effectively and efficientlyOutline long term coordination of projects and planningHelp in scheduling and controlling projects
Disadvantages of CPM
Difficult for beginners to understandToo expensive to acquire the softwareTime-consuming when structuring the CPMDifficult to allocate resourcesControlling and scheduling activities is difficult
Comparison Chart: PERT Vs CPM
|Stands For||Project Evaluation Review Technique||Critical Path Method|
|Meaning||The technique used to manage uncertain activities of a project||The statistical technique used to manage the activities of a project|
|Method||Control time||Control cost and time|
|Evolution||Research and development project||Construction of project|
|Manages||Unpredictable activities||Predictable activities|
|Model||Probabilistic Model||Deterministic Model|
|Estimates||Three-time estimates||One time estimate|
|Appropriate for||High precision time estimate||Reasonable time estimate|
|Nature of jobs||Non-repetitive nature||Repetitive nature|
|Critical and Non-critical activities||No differentiation||Differentiated|
|Crashing concept||Not applicable||Applicable|
Differences Between PERT and CPMPERT is a technique of planning, scheduling, controlling, organizing, and coordinating uncertain activities whereas CPM is a statistical method of planning, scheduling, organizing, coordinating and controlling well-defined activitiesPERT is a technique of planning and controlling time while CPM is a technique of controlling cost and timePERT came as a result of the research and development of projects while CPM as a result of the construction projects.The model of PERT is probabilistic whereas that of CPM is deterministic.PERT has three times estimates while CPM has only one time estimatesPERT has a high precision time estimate whereas CPM has a reasonable time estimate.PERT deals with unpredictable activities whereas CPM deals with predictable activitiesPERT deals with jobs that are non-repetitive whereas CPM deals with repetitive projects.CPM has boundaries between critical and non-critical activities unlike in PERTPERT is ideal for research and development projects while CPM is suitable for non-research projects.The crashing concept is applicable in CPM to reduce time while not applicable to PERT.PERT is set according to events while CPM align with activities
The core difference between PERT and CPM is Pert deals with unpredicted activities while CPM with predicted activities. Besides that, both are essential in the reduction of production cost and time.
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