EBK PRINCIPLES OF OPERATIONS MANAGEMENT
EBK PRINCIPLES OF OPERATIONS MANAGEMENT
10th Edition
ISBN: 8220102744059
Author: HEIZER
Publisher: PEARSON
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Chapter 3, Problem 10DQ
Summary Introduction

To determine: How the times and variances of an expected activity can be computed in a PERT network.

Introduction:

The activity times of various tasks in a PERT project network are assumed to follow a probability distribution.

For calculating the expected times and variances, the following are the parameters required:

  • Optimistic time: This is the time denoted by “a”, which is the best possible or in other words, the quickest time in which an activity can be completed, assuming that everything goes as per plan.
  • Pessimistic time: This is the worst case scenario, where all the conditions are adverse or unfavorable. The maximum time which may be taken in such a situation is the pessimistic time denoted by “b”.
  • Most likely time: The most realistic estimate of the time, denoted by “m” in normal conditions, is another parameter which is important in the computation of expected times and variances.

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Describe how expected acti vity times and variances can be computed in a PERT network.
Describe how expected activity times and variances can be computed in a PERT network.
b) – Draw the Activity-on-Node (AON) diagram using the following representation for every node: Activity Description Expected Time ES EF LS LF Slack C.) Complete the following table, determine the expected time of completion assuming that the project starts at week 0 (zero) and identify the critical path for this project. Demonstrate all your calculations. On Critical Path? Activity Activity Description ES EF LS LF Slack Yes or No Locate new facilities 2 Order furniture Interview prospective staff Hire and train staff 3 4. Remodel facilities Receive and set up furniture Move in and start up 6 7 a) Complete the following table, calculate the project variance and project standard deviation. Demonstrate all your calculations.

Chapter 3 Solutions

EBK PRINCIPLES OF OPERATIONS MANAGEMENT

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