Production and Operations Analysis, Seventh Edition
Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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Chapter 10, Problem 29AP

A.

Summary Introduction

Interpretation: The expected time duration of the filming is to be computed including the PERT estimates is to be calculated.

Concept Introduction: Program Evaluation and review technique is a planning and control tool, wherein the work flow of various activities of a project are graphically represented and analyzed. This technique is distinct in the way that it deals with uncertainty in the activity completion times.

B.

Summary Introduction

Interpretation: The probability that the number of days required for the filming of the scene is 30 percent longer is to be computed.

Concept Introduction: Program Evaluation and review technique is a planning and control tool, wherein the work flow of various activities of a project are graphically represented and analyzed. This technique is distinct in the way that it deals with uncertainty in the activity completion times.

C.

Summary Introduction

Interpretation: The number of days to be planned for the filming, so as to be 95 percent sure of completion is to be calculated.

Concept Introduction: Program Evaluation and review technique is a planning and control tool, wherein the work flow of various activities of a project are graphically represented and analyzed. This technique is distinct in the way that it deals with uncertainty in the activity completion times.

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Recently, you were assigned to manage a project to remodelthe seminar room for your company. You have constructed anetwork diagram depicting the various activities in the project(Figure 7.13). In addition, you have asked your team to estimatethe amount of time that they would expect each of the activitiesto take. Their responses are shown in the following table: a. What is the expected completion time of the project?b. What is the probability of completing the project in 21 days?c. What is the probability of completing the project in 17 days?
Understanding that, in the three-time estimate approach, the time to complete an activity is assumed to follow a Beta distribution.  Write the formula illustrated in the text.
Suppose that a task in a project has the following time​ estimates:   to=optimistic completion time=10 weeks tm=most likely completion time=17 weeks tp=pessimistic completion time=19 weeks   Compute the expected task variance.   The task expected task variance is _____ weeks. ​(Enter your response rounded to two decimal​ places.)
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