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Question
The following table contains a list of activities, with precedence requirements and crash costs. All start and finish times and crash costs are on a per-week basis.
a. Determine the project cost and duration without crashing.
b. Determine the least expensive project cost if the duration is to be 10% shorter than normal project duration.
c. Determine the least expensive project cost if the duration is to be 20% shorter than normal project duration.
d. Create a graph that shows project expediting cost plotted as a function of the reduction in project duration.
| Activity | Normal Time | Crash Time | Normal Cost | Crash Cost | Predecessor |
| A | 10 | 7 | 2,000 | 2,600 | |
| B | 12 | 8 | 1,500 | 2,000 | A |
| C | 16 | 12 | 2,200 | 3,000 | A |
| D | 8 | 7 | 2,500 | 3,000 | B |
| E | 13 | 10 | 1,950 | 2,275 | C |
| F | 9 | 8 | 800 | 1,000 | D |
| G | 24 | 29 | 3,650 | 4,000 | E, F |
| H | 17 | 14 | 1,200 | 1,800 | G |
Answer
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Related questions
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Q:
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Q:
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Q:
Construct a 3-sigma and R-chart for the length in centimeters of a part from the following table. Sample #
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Q:
The three-person crew worked their way through the neighborhood, testing doorknobs and windows and slipping past security systems like a team of ninjas. Of course, they weren't ninjas, but a crew of brazen burglars, hoping to grab cash and other valuables to fence at the next level of their supply chain. Fortune smiles on them on this day in the prestigious Edmond Oaks neighborhood. A lawn maintenance crew is creating a tremendous racket mowing and edging lawns, which completely drowns out the sounds of breaking glass. Details of the day's haul appear in Table C.
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Table C: The Haul ITEM
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LABOR
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1 hr
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$250
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$1 $200 cash
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represents the cost of gasoline and surgical gloves, and overhead is 20% of the sales price of
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Q:
Consider this list of jobs that have just arrived and are ready for processing. They all require processing first on machine 1 and then on machine 2. Both machines are now idle. Develop a schedule that minimizes makespan and calculate this makespan time. Now assume that each job can be split into two jobs, each having half the duration on both machine 1 and machine 2. Using the original sequence that minimized average flow time, calculate the flow times for all split jobs What is the effect of this new schedule on the average flow time for these split jobs? Job
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Machine 2 1
14
6 2
11
12 3
16
14 4
12
8 5
22
9 6
13
15 7
10
12 8
8
13