Answered: a) The expected (estimated) time for…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Ross Hopkins, president of Hopkins Hospitality, has developed the tasks, durations, and predecessor relationships in the following table for building new motels.

Activity a m b Immediate Predecessor(s) Activity a m b Immediate Predecessor(s)
A 6 8 12 - G 2 3 4 C, E
B 1 9 24 A H 2 2 2 F
C 8 14 16 A I 7 7 7 F
D 4 7 10 A J 6 7 12 D, G, H
E 1 2 4 B K 1 1 4 I, J
F 6 9 20 C, E

a) The expected (estimated) time for activity C is 13.33
weeks. (Round your response to two decimal places.)

b) The variance for activity C is 1.78
weeks. (Round your response to two decimal places.)

c) Based on the calculation of the estimated times, the critical path is

A - C - F - H - J - K

d) The estimated time for the critical path is [ ? ]

enter your response here

weeks. (Round your response to two decimal places.)

Expert Solution

Step 1 Introduction:-

A network diagram shows the sequence of the task that is done to complete a project. It usually shows the link of each task with the duration taken by each activity with respect to the completion of the project. Each task is shown with the nodes that are connected with each other with the help of arrows. There are 2 types of network diagrams:- CPM and PERT.