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Difference between PERT and CPM and theirapplication in house construction

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Agenda

Introduction

Techniques PERT & CPM

Applications Differences

Benefits

Conclusion

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Introduction

Network Analysis

Technique of operations research

Planning, scheduling and controllingLarge and complex projects.

Objective

Schedule required activities efficientlyComplete it on or before specific time limit

Minimum cost.

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Network Analysis - Techniques PERT Program Evaluation and review Technique

CPM Critical Path Method

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CPMCPM Critical Path Method

Developed by EI DuPont company along with

Remington Rand corporation.Aim was to provide a technique for control of the

maintenance of the cos plants.

Use extended to cost & resource allocation.

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Applications of network analysis Construction

Software development

Research projects Product development

Engineering

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Application in house constructionActivity Description Duration

A Acquiring land 4

B Foundation 6

C Construction of basic

structure

2

D Wood works 5

E Concrete 2

F Plumbing & Electrical

work

7

G Flooring & designing 4

H Finishing interior &

exterior

1

Construction

Project

E.g. 1

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1 2 3 4

5

6

7 8

Solution

A B C

D

E

F

G

H

E= 0

L= 0E= 4

L= 4

E= 10

L= 10

E= 12

L= 12

E= 17

L= 17

E= 14

L= 14

E= 24

L= 24

E= 25

L= 25

Critical Path :1- 2- 3- 4- 5- 7- 8 25 weeks

Non critical path : 1- 2- 3- 4- 6- 7- 8 19 weeks

Float 6 weeks

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Difference b/w PERT & CPMPERT

Uses 3 estimates to form

weighted avg of expectedcompletion time.

Tool for planning &control of time.

CPM

Uses 1 estimate to form

weighted avg of expectedcompletion time.

Tool for planning &control of time & cost.

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ContdUsed for projects

involving activities ofnon-repetitive nature.

Used for projectsinvolving activities ofrepetitive nature.

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ConclusionThus these techniques help in completion of projects

with no over-runs of time and cost.

Permits utilization of networks for similar projectswhich results in faster planning.

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