The weekly output of a production process is shown below, together with data for labor and material inputs. The standard inventory value of the output is $100 per unit. Overhead is charged weekly at the rate of $1,200 plus 1.5 times direct labor cost. Assume a 40-hour week and an hourly wage of $12. Material cost is $6 per running foot. What is the average multifactor productivity for this process for each week?
|
Week
|
Output
|
Number of workers
|
Material (ft)
|
|
1
|
450
|
7
|
2800
|
|
2
|
384
|
5
|
2400
|
|
3
|
412
|
5
|
2600
|
|
4
|
401
|
6
|
2500
|
Why are operations managers faced with ethical and social challenges? What are some of the ethical and social challenges faced by operations managers?
Identify and explain the four basic global operations strategies. Give an example of each strategy.
A company is choosing an outside firm to provide its payroll services. It has chosen four comparative categories of interest: client reviews, financial condition, IT capabilities, and government stability. These categories have been assigned weights of 40%, 20%, 10%, and 30%, respectively.
Three potential providers were scored on each of those factors (see table below) using a scale of 1-10, with a score of 1 meaning worst possible and 10 meaning best possible. Using the factor-rating method, which provider should be chosen?
|
|
Provider A
|
Provider B
|
Provider C
|
|
Client reviews
|
4
|
8
|
8
|
|
Financial condition
|
7
|
4
|
9
|
|
IT capabilities
|
5
|
8
|
8
|
|
Government stability
|
3
|
2
|
3
|
A network consists of the following list. Times are given in weeks.
|
Activity
|
Preceding
|
Duration
|
|
A
|
--
|
6
|
|
B
|
A
|
4
|
|
C
|
A
|
10
|
|
D
|
A
|
4
|
|
E
|
B
|
6
|
|
F
|
B
|
7
|
|
G
|
C, F
|
3
|
|
H
|
D
|
3
|
|
I
|
H
|
8
|
|
J
|
G, I
|
6
|
|
K
|
E, J
|
2
|
a. Draw the network diagram.
b. Which activities form the critical path?
c. How much slack exists at each activities?
d. What is the duration of the critical path?
Given the project within the table below, calculate the critical path .
|
Activity
|
Pessimistic
(hours)
|
Most likely (hours)
|
Optimistic
(hours)
|
Immediate Predecessors
|
|
A
|
5
|
3
|
1
|
None
|
|
B
|
6
|
3
|
1
|
None
|
|
C
|
10
|
7
|
4
|
None
|
|
D
|
9
|
6
|
3
|
B,C
|
|
E
|
3
|
2
|
1
|
D
|
|
F
|
4
|
2
|
1
|
E
|
|
G
|
8
|
4
|
1
|
A,F
|
Dell computers sells laptops. Table 1 presents the 12 month sales for the year 2017 .
|
Month
|
Sales (in thousands)
|
|
Jan
|
10
|
|
Feb
|
8
|
|
Mar
|
12
|
|
Apr
|
15
|
|
May
|
18
|
|
Jun
|
16
|
|
Jul
|
12
|
|
Aug
|
13
|
|
Sep
|
19
|
|
Oct
|
21
|
|
Nov
|
11
|
|
Dec
|
14
|
Forecast Jan 2018 sales using: (1) five period moving average; (2) A four period weighted moving average with weights 0.3 for Dec, 0.3 for Nov, 0.2 for Oct, 0.2 for Sep; (3) Exponential smoothing with smoothing constant 0.3, assuming a Aug forecast 15.
JDI, Inc. is trying to decide whether to make or buy a part (#J-45FPT). Purchasing the part would cost $1.50 each. If they design and produce it themselves, it will result in a per unit cost of $0.75.
However, the design investment would be $50,000. Further, they realize that for this type of part, there is a 30% chance that the part will need to be redesigned at an additional cost of $50,000. Regardless of whether they make or buy the part, JDI will need 100,000 of these parts. Using decision trees analysis and EMV, what should JDI do? Show the decision tree.
Identify each of the purposes of project scheduling.
Describe the European Union Emissions Trading System to combat climate change.