Question

A car dealership decided to add an annex to its sales office as a customer lounge....

A car dealership decided to add an annex to its sales office as a customer lounge. The project is divided into the activities listed in the following table. The immediate predecessor(s), times and costs, both normal and crashed, are given. To finish the project sooner, the dealership has to make time and cost tradeoffs. If the project needs to be finished in 25 weeks, you are required to formulate a linear programming model to decide about how much to crash for each activity.

Activity

Immediate Predecessor(s)

Time (weeks)

Cost ($)

Normal

Crashed

Normal

Crashed

A

5

3

1800

2400

B

A

7

4

2500

4300

C

A

6

4

3200

4600

D

B, C

7

5

2700

3500

E

C

8

4

3300

3800

F

D

8

5

2300

2900

G

E

5

3

4200

4700

H

F, G

6

3

2400

3300

To answer the following questions, you may want to use the last column of the following table to compute the cost of crashing an activity by one week.

Activity

Immediate Predecessor(s)

Time (weeks)

Cost ($)

Cost/Week

Normal

Crashed

Normal

Crashed

A

5

3

1800

2400

B

A

7

4

2500

4300

C

A

6

4

3200

4600

D

B, C

7

5

2700

3500

E

C

8

4

3300

3800

F

D

8

5

2300

2900

G

E

5

3

4200

4700

H

F, G

6

3

2400

3300

QUESTION 45

  1. Which of the following is a good constraint to model the fact that activity A is an immediate predecessor of activity C?

    A Xa-Xc-Yc =>6
    B -Xa+Xc+Yc <=6
    C -Xa+Xc+Yc =>6
    D Xa+Xc+Yc =>6
    E

    none of the above.

QUESTION 46

  1. Which of the following is a good constraint to model the fact that activity E is an immediate predecessor of activity G?

    A Yg =<5
    B -Xe+Xg+Yg =>5
    C -Xe+Xg+Yg =>3
    D -Xe+Xg+Yg =>2
    E

    none of the above.

QUESTION 47

  1. Which of the following represents the constraint(s) of modeling the fact that activities B and C are immediate predecessors of activity D?

    A -Xb-Xc+Xd+Yd =>7
    B -Xb-Xc+Xd+Yd =>5
    C -Xb+Xd+Yd =>7 and -Xc+Xd =>7
    D -Xb+Xd+Yd =>7 and Yg <=2
    E

    none of the above.

QUESTION 48

  1. Which of the following represents the constraint(s) of modeling the fact that activities F and G are immediate predecessors of activity H?

    A -Xf+Xh+Yh =>6 and -Xg+Xh+Yh =>6
    B -Xf+Xh+Yh =>6
    C -Xg+Xh+Yh =>6
    D -Xf+Xh+Yh =>3 and -Xg+Xh+Yh =>3
    E

    none of the above.

QUESTION 49

  1. A constraint in the model means

    A

    activity A should be finished within 2 weeks.

    B

    the total time taken by activity A cannot be more than 2 weeks.

    C

    activity A cannot be crashed by more than 2 weeks.

    D

    activity A must be finished in week 2 after the start of the activity.

    E

    none of the above.

QUESTION 50

  1. The right linear programming model should be?

Homework Answers

Answer #1

Answer 45: Option B

Since the normal time of the predecessor “A” is less than the normal time of the activity “C” itself, therefore option B is chosen.

Answer 46: Option B

Since the normal time of the predecessor “E” is more than the normal time of the activity “G” itself, therefore option B is chosen.

Answer 47: Option A

Since the normal time of the predecessor “B & C” is less than or equal to the normal time of the activity “D” itself, therefore option A is chosen.

Answer 48: Option E

Since the normal time of activity “H” is in between the normal time of its predecessor activity “F & G” therefore no relation can be established.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider the following information for a project to add a drive-thru window at Crestview Bank.       Activity...
Consider the following information for a project to add a drive-thru window at Crestview Bank.       Activity Activity Time​ (weeks) Immediate​ Predecessor(s) A 6 − B 1 − C 9 − D 3 ​A, B E 6 B F 4 ​D, C G 5 ​E, C H 9 ​F, G b. Specify the critical path. The critical path is _____ and the project duration is_____ c. Calculate the slack for activities A and D.
Office Automation, Inc., developed a proposal for introducing a new computerized office system that will standardize...
Office Automation, Inc., developed a proposal for introducing a new computerized office system that will standardize the electronic archiving of invoices for a particular company. Contained in the proposal is a list of activities that must be accomplished to complete the new office system project. Use the following relevant information about the activities: Immediate Time (weeks) Cost ($1000s) Activity Description Predecessor(s) Normal Crash Normal Crash A Plan needs — 13 8 30 130 B Order equipment A 9 6 120...
The following activities are part of a project to be scheduled using CPM: ACTIVITY IMMEDIATE PREDECESSOR...
The following activities are part of a project to be scheduled using CPM: ACTIVITY IMMEDIATE PREDECESSOR TIME (WEEKS) A — 7 B A 6 C A 2 D C 4 E B D 3 F D 4 G E F 6 a. Draw the network b. What is the critical path c. How many weeks will it take to complete the project d. Identify the early start, early finish, late start, and late finish for each activity in the project...
1. A landscaping upgrade project consists of following activities. Times are given in weeks. Activity Immediate...
1. A landscaping upgrade project consists of following activities. Times are given in weeks. Activity Immediate Predecessor Activity Time A - 5 B A 8 C A 7 D - 6 E B, D, C 8 F D 3 G D 3 a. Draw the network diagram and find the ES, EF, LS, LF, and slack for each activity. b. Construct an early-start-date Gantt chart for the project. c. As a project manager, where would you focus your attention, given...
All information needed to solve this problem is present Problem 9-24 (Algorithmic) Office Automation, Inc., developed...
All information needed to solve this problem is present Problem 9-24 (Algorithmic) Office Automation, Inc., developed a proposal for introducing a new computerized office system that will standardize the electronic archiving of invoices for a particular company. Contained in the proposal is a list of activities that must be accomplished to complete the new office system project. Use the following relevant information about the activities: Immediate Time (weeks) Cost ($1000s) Activity Description Predecessor(s) Normal Crash Normal Crash A Plan needs...
Activity Immediate Predecessor Optimistic Time Most-likely time Pessimistic Time A None 3 6 9 B A...
Activity Immediate Predecessor Optimistic Time Most-likely time Pessimistic Time A None 3 6 9 B A 3 5 7 C A 4 7 12 D B 4 8 10 E C 5 10 16 F D, E 3 4 5 G D, E 3 6 8 H F 5 6 10 I G 5 8 11 J H, I 3 3 3 (a). What is the expected time for each activity? (2 points) (b.) What is the variance for each...
HW8-Ch2-Executing Strategy: Project Management 1. A computer-system installation project consists of eight activities. The immediate predecessors...
HW8-Ch2-Executing Strategy: Project Management 1. A computer-system installation project consists of eight activities. The immediate predecessors and activity times in weeks are as follows: Activity Immediate Predecessors Activity Time A — 2 B — 7 C A 3 D A, C 6 E C 5 F D, E 2 G B, C 10 H G 4 What is the critical path? What is the project complete time? a. BCDEF; 22 weeks b. ACEF; 23 weeks c. BGH; 21 weeks 2....
Consider a closed-polygon traverse (lengths in feet). Balance the traverses by coordinates using the compass rule....
Consider a closed-polygon traverse (lengths in feet). Balance the traverses by coordinates using the compass rule. Course AB BC CD DA Bearing N 22∘36'40" W S 60∘39'24" W S 38∘46'10" E N 88∘22'58" E Length 314.02 264.49 213.50 217.69 Compute the unbalanced departures. Express your answers, separated by commas, to three decimal places. AB=,BC=, CD=,DA= -120.733,-230.556,133.691,217.603 ft, ft, ft, ft SubmitPrevious Answers Correct Part B Part complete Compute the unbalanced latitudes. Express your answers, separated by commas, to three decimal...
Use the following data for question below. Activity Normal Time (weeks) Crash Time (weeks) Normal Cost...
Use the following data for question below. Activity Normal Time (weeks) Crash Time (weeks) Normal Cost Total Cost with Crashing Pred 1 Pred 2 A 10 7 $200 $400 B 15 10 $250 $600 C 13 8 $600 $1,500 A B D 14 10 $800 $1,200 A B E 8 4 $1,000 $3,000 C D F 12 6 $1,200 $1,800 C D G 7 6 $700 $1,400 E F H 5 3 $500 $900 E F If the project must...
Given the information below: (Use normal time to calculate original path) a) Which activity(s) should be...
Given the information below: (Use normal time to calculate original path) a) Which activity(s) should be crashed and what is the cost to reduce the project completion time from 22 to 21 days? b) Which activity(s) should be crashed and what is the cost to reduce the project completion time from 21 to 20 days? c) Which activity(s) should be crashed and what is the cost to reduce the project completion time from 20 to19 days? d) What is the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT
Active Questions
  • A Database Administrator (DBA) is play both managerial role and technical role in a modern organization;...
    asked 5 minutes ago
  • The Federal Election Commission collects information about campaign contributions and disbursements for candidates and political committees...
    asked 5 minutes ago
  • In the week before and the week after a​ holiday, there were 10,000 total​ deaths, and...
    asked 7 minutes ago
  • 1. Identify the vertex of the quadratic equation y=2x2+8x-10. using the formula 2. Write the equation...
    asked 23 minutes ago
  • How well do you understand this material? Reading the material is separate than understanding it; further,...
    asked 26 minutes ago
  • Analyze the behavior of capacitors under steady state direct current and high frequency AC current (500...
    asked 26 minutes ago
  • Traffic on the eastbound approach of a signalized intersection is traveling at 48 km/h, with a...
    asked 48 minutes ago
  • Students in a chemistry class convince their teacher to use the following "group grading" scenario. Students...
    asked 48 minutes ago
  • The letters of the word "REARRANGE" are randomly rearranged. What is the probability that this rearrangement...
    asked 50 minutes ago
  • how does a firm’s home country affects the capital structure of a firm, elaborate on the...
    asked 51 minutes ago
  • A company makes two types of magazine racks, metal and plastic. The metal magazine racks sell...
    asked 54 minutes ago
  • What is the margin of error (M.E.) for a 95%, two-sided confidence interval on mu when...
    asked 54 minutes ago