# Project Management-Extra Crashing Problems with Answers

Topics: Critical path method, Crash Bandicoot, Project management Pages: 9 (1167 words) Published: February 7, 2013
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)

Problem #2 (Answers on Pages 6-7)

You have the following time and cost information below for use in a Time-Cost CPM Scheduling model. Time Units: Weeks

|Activity |I.P. |Normal Time (NT)|Crash Time (CT) |NT-CT |Normal Cost (NC) |Crash Cost (CC) |CC-NC |Crash Cost per Week | |A |-- |3 |2 | | \$ 400 | \$ 600 | | | |B |-- |5 |3 | | \$ 600 | \$ 1,200 | | | |C |-- |4 |1 | | \$ 200 | \$ 800 | | | |D |A |5 |4 | | \$ 500 | \$ 900 | | | |E |B, C |4 |2 | | \$ 300 | \$ 500 | | | |F |D, E |7 |-- | | \$ 1,000 | -- | | |

Part A: What is the normal cost to complete this project?

Part B: Draw the network diagram. List all paths and their times before...