operating & management.

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homework.docx

Problem 1

Determine the following quantities for each activity: the earliest start time, latest start time, earliest finish time, latest finish time, and slack time. List the critical activities and determine the expected duration of the project.

5

4 7

9 2

2 10

( 8 )4 5 7 8 2

1

LS LF

ES EF

3

12

10 6

11

3

( 5 )6 6 4 9

Summary:

Activity ES EF LF LS Slack

1-2

0

4

2-4

4

13

Problem 3

Calculate the Multi-Factor productivity for each week using the data shown below for production of nutrition bars. What do the productivity figures suggest? Assume a 40-hour weeks and an hourly wage of $12. Overhead is 1.5 times weekly labor costs. Material cost is $6 per pound. Standard price is $140 per unit. PROBLEM 2 - 3

Week

Output (Units)

Workers

Materials (lbs)

1

30000

6

450

2

33600

7

470

3

32200

7

460

4

35400

8

480