# Project Management-Extra Crashing Problems with Answers

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• Published : February 7, 2013

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Problem #1 (Answers on Pages 5-6)

Below are the data for a Time-Cost CPM Scheduling model analysis. The time is in days and the costs include both direct and indirect costs. (Time Units = Days).

|Activity |Immediate |Normal Time |Crash Time |Normal Cost |Crash Cost | | |Predecessor | | | | | |A |-- |5 |2 |200 |800 | |B |A |6 |4 |300 |600 | |C |B |1 |-- |300 |-- | |D |A |3 |2 |500 |550 | |E |C, D |3 |1 |500 |900 |

Part A: Draw the network diagram. (10 points)

Part B: Enter the early start-early finish, and the late start-late finish time for the activities in the diagram in the table below. (10 points) NOTE: You must fill in the table to get credit.

|Activity |Early Start |Early Finish |Late Start |Late Finish |Amount of Slack | |A | | | | | | |B | | | | | | |C | | | | | | |D | | | | | | |E | | | | | |

Part C: What is the critical path? (5 points)

Part D: How many days will it take to complete the project? (5 points)

Part E: If you crash this project to reduce the total time by one day which activity would you crash and what is it’s cost? (10 points)