# Question

The Durango Paper Company has identified eight activities that need to be completed in order to comply with new EPA air emission standards. Information about these activities are shown below.
Activity
Description
Immediate Predecessor
Average Time (weeks)
A
Build internal components
--
2
B
Modify roof floor
--
3
C
Construct air stack
A
2
D
Pour concrete frame
A,B
4
E
Build high temp. burner
C
4
F
Install control systems
C
3
G
Install air pollution device
D,E
5
H
Inspect/test
F,G
2
Draw a network diagram that represents this project (use Activity on Node convention):
Identify all paths and path durations.
Path1. A(C(F(H (9 weeks)
Path2. A(C(E(H (10 weeks)
Path3. A(C(E(G(H (15 weeks)
Path4. A(D(G(H (13 weeks)
Path5. B(D(G(H (14 weeks)
Indicate the critical path(s) and activities.
A C E G H (15 weeks)
The project manager at Durango Paper Company wants to know the probability of completing this project in 15 weeks or less. The following additional information has been collected:
Activity
Optimistic Time
Likely Time
Pessimistic Time
A
1
2
3
B
2
3
4
C
1
2
3
D
2
4
6
E
1
4
7
F
1
2
9
G
3
4
11
H
1
2
3
Activity
Optimistic Time
Likely Time
Pessimistic Time
Estimated Time
Variance
S.D
A
1
2
3
2
0.11
0.33
B
2
3
4
3
0.11
0.33
C
1
2
3
2
0.11
0.33
D
2
4
6
4
0.44
0.67
E
1
4
7
4
1.00
1.00
F
1
2
9
3
1.78
1.33
G
3
4
11
5
1.78
1.33
H
1
2
3
2
0.11
0.33
25
5.44
2.33
Z= (15-25)/2.33 = -4.29
P(z<=15) = 0.000009
Probability of completing in 15 weeks or less =
3. Durango Paper Company has been given 12 weeks to install air pollution equipment or face a court-ordered penalty of $1500 per week beyond 12 weeks. Using the following, identify what activities should be crashed each week and how many weeks should be crashed to minimize total costs.
Activity
Normal Time (wks)
Crash Weeks Available
Crash Cost per Week
Crashed By
Total Cost
A
2
1
750
1
750
B
3
1
500
1
500
C
2
1
1000
1
1000
D
4
3
800
3
2400
E
4
2
750
2
1500
F
3
2
500
2
1000
G
5
1
1200
1
1200
H
2
1
3000
1
3000
Total
25
12
12
11350
Extra Cost if the weeks are not crashed : 13 * 1500 = 19500
Extra Cost after crashing = 11350 +1500 = 12850
Optimal number of weeks crashed:
Activities crashed by week:
Total cost after optimizing crashing costs:

## Answer to relevant Questions

Studies have concluded that the deadweight loss of monopoly power in the U.S. is less than 0.5 percent of GNP. From your knowledge of the determinants of the deadweight loss, explain why such a small figure is plausible. Multi-base Company Limited is a diversified business group with interests in fabric and yarn manufacturing, paper and pulp, and cement. Its manufacturing units are located across the country and number eight- one for fabric, ...Consider an economy described by the following equations:Y = C + I + G + NXY = 5,000G = 1,000T = 1,000C = 250 + 0.75 (Y – T)I = 1,000 – 50 rNX = 500 - 500εr = r* = 5a. In this economy, solve for national saving, ...John Walters is comparing the cost of credit to the cash price of an item. If John makes a $80 down payment and pays $34 a month for 24 months, how much more will that amount be then the cash price of $695?(a) Find the amplitude, period, and phase shift of y = 3sin[π(x – 1/3)](b) A ladder leans against a verfical wall of a building so that the angle between the ground and the ladder is 72° and its bottom on the ground is ...Post your question

0