Operations Research Tutorial #45: Network Analysis #13_Project Optimization by Activity Crashing

Watch all my Operations Research (OR) Tutorials below-

Hello friends,welcome to my new series of tutorials on Project Management using Network Analysis.
Today I'll tell you how to Optimize Project Cost and Project Duration using Activity Crashing.

This video explains-
1. Explanation of Project Management Word Problem
2. What is Predecessor Activity
3. What is Normal Project Duration and Project Cost
4. What is Crash Duration and Crash Cost - Explanation
5. Meaning of Critical Path and Critical Activities
6. How to calculate the Direct Cost,Indirect Cost,Crashing Cost and Total Cost of Project
7. How to calculate Cost Slope for critical activities
8. How to find critical cost and project completion time
9. How to reduce Project Cost - Step by Step Explanation
10. Detailed explanation of the concepts and best practices for exam
11. How to find Optimum Project Duration and Optimum Project Cost

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[Prakarc]

All Concepts of CPM, PERT and Crashing understood in less than an work....
use of examples made it easy...

[jayarajput]

thanx Sir for ur video it was v helpfull for me thanx a lot I tired a lot to how to crush but you made possible to understand each n every thing perfectly thanx alot

[karanmakwana]

Really cleared my Doubts Thanks a. Lot sir!

[swapnilkumar]

Sujoy ... u have good grab on every concept about ur subject .... hats off to that .... these videos are really helpful..!! .. try to add few questions with answers (without solution) after u complete ur lecture in video.. it will help us more for practice... thank you 

[sirivandana]

hi sir, there seems to be a mistake in calculating crashing cost. the cost of previous crashing is not considered here. crashing cost for the final step should have been rs. 600 but you took it as rs. 150. Hence total cost will be rs. 7100 and not rs. 6650. Please verify.

[akshaydesai]

Can u also explain project crashing in which other paths also become critical simultaneously.

[SaurabhmoyLahiri]

thank you very much. u r a life saver.

[akshaydesai]

Suppose there are 3 paths in which one activity is common and crash cost is 50rs. Duration of 3 paths are 37, 36 & 34 days respectively. Do we have to crash the common activity with least cost so that duration of all paths are reduced or do we have to crash activities in such a way that duration should not be less than 34 days even if total crashing cost is higher than 50rs.? Pleas clarify the same asap.

[purvadashottar]

If there appears to be another critical path after the second crashing, The cost of that path will be considered and crashed too?

[pjasrai]

Sir, please make videos on TRAVELLING SALESMAN PROBLEM AND BRANCH AND BOUND ALGORITHM.!
Your videos have made studying OR a delight.. its a request to make videos on these 2 topics asap.!

[solomonsackey]

Nice video but I always ask myself how this can be applied to a large scale project where there are more thank more than 300 activities

[arjumandmahak]

can u recommend a book for this with a lot of questions?

[dsanrame]

sir how to find free float, independent float, interfering float, slack...

[vishalkotia]

sir plz upload a problem on game theory graphical method..

[KumarHemjeet]

for D it will be 2 days na ??? 8--6 you wrote 7 .

[KumarHemjeet]

I am really going mad .why aren't you crashing D directly to 6 days ???

[RAJU-GORAI]

What if Crash Time is greater than Normal Time?

Here is the Question,
Please help me to solve it..

The data for a network is given below. Crash the network to
minimize the project duration and determine the project cost for that
duration.
Activity Normal time Normal cost Crash time Crash cost
1-2 12 85 10 140
2-3 11 95 8 160
2-4 9 110 6 170
3-4 8 120 7 160
3-5 11 70 10 100
3-6 12 65 6 90
4-5 8 75 9 90
5-6 9 90 7 130

[abir]

whatever you teach, you should know a bit of limits in mathematics. 0/0 is undefined, its not 0 lolz