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Chapter 1: Q4-5DQ (page 100)

鈥淧roject control should always focus on the critical path.鈥� Comment.

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Project Controls is a strategy that comprises the facilities, methods, as well as instruments for organizing, analyzing, as well as regulating all aspects of a capital program's lifespan.

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01

Project Control

Project control is the procedure for obtaining as well as assessing project information to reduce prices as well as timeliness on track. Project controls are responsible for beginning, designing, analyzing as well as regulating, reporting, or finishing out the cost of the project as well as schedules. Quality control measures, in the ultimate, are continuous methods for monitoring the status of the project, anticipating intended benefits depending on those measures, and then enhancing project outcomes if those anticipated results are undesirable.

02

Project control should always focus on the critical path

In several project scenarios, it is not the essential path tasks that cause issues, but instead noncritical tasks that are becoming critical for a variety of purposes. In the framework of CPM, the tasks on the critical route may have modest variations as well as can be viewed as nearly certain. Similarly, operations of the critical route may have unusually significant variations and, if not adequately managed, may cause the project to be delayed.

While project supervision should maintain a record of critical path tasks, it may be more valuable to concentrate on those tasks that are not on the main route but have a higher level of uncertainty connected with them for one purpose as well as another. Along with similar principles, some writers have proposed replacing the critical route method with a reporting and analysis method, in which simulations are used to predict which operations are probable to causea delay in the project.

Instead of the critical route, these tasks will become the center of administrative control. Furthermore, the critical route focuses on the project's timeframe as well as budget. Certain operations may be deemed "essential" due to expense as well as quality problems.

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Most popular questions from this chapter

Now, look at the effect of increasing the number of beds by 50 percent. How many operations could the hospital perform per day before running out of bed capacity? (Assume operations are performed five days per week, with the same number performed on each day.) How well would the new resources be utilized relative to the current operation? Could the hospital perform this many operations? Why?

Always Rain Irrigation, Inc., would like to determine capacity requirements for the next four years. Currently, two production lines are in place for making bronze and plastic sprinklers. Three types of sprinklers are available in both bronze and plastic: 90-degree nozzle sprinklers, 180-degree nozzle sprinklers, and 360-degree nozzle sprinklers. Management has forecasted demand for the next four years as follows:

Yearly Demand

1 (IN 000s)

2 (IN 000s)

3 (IN 000s)

4 (IN 000s)

Plastic 90

32

44

55

56

Plastic 180

15

16

17

18

Plastic 360

50

55

64

67

Bronze 90

7

8

9

10

Bronze 180

3

4

5

6

Bronze 360

11

12

15

18

Both production lines can produce all the different types of nozzles. The bronze machines needed for the bronze sprinklers require two operators and can produce up to 12,000 sprinklers. The plastic injection molding machine needed for the plastic sprinklers requires four operators and can produce up to 200,000 sprinklers. Three bronze machines and only one injection molding machine are available. What are the capacity requirements for the next four years? (Assume that there is no learning).

Johnson Industries received a contract to develop and produce four high-intensity long-distance receiver/transmitters for cellular telephones. The first took 2,000 labor hours and \(39,000 worth of purchased and manufactured parts; the second took 1,500 labor hours and \)37,050 in parts; the third took 1,450 labor hours and \(31,000 in parts, and the fourth took 1,275 labor hours and \)31,492 in parts. Johnson was asked to bid on a follow-on contract for another dozen receiver/transmitter units. Ignoring any forgetting factor effects, what should Johnson estimate time and parts costs to be for the dozen units? (Hint: There are two learning curves鈥攐ne for laborand one for parts.)

Why would subcontractors for a government project want their activities on the critical path? Under what conditions would they try to avoid being on the critical path?

A builder has located a piece of property that she would like to buy and eventually build on. The land is currently zoned for four homes per acre, but she is planning to request new zoning. What she builds depends on the approval of zoning requests and your analysis of this problem to advise her. With her input and your help, the decision process has been reduced to the following costs, alternatives, and probabilities:

Cost of land: \(2 million.

Probability of rezoning: 60.

If the land is rezoned, there will be additional costs for new roads, lighting, and so on, of \)1 million. If the land is rezoned, the contractor must decide whether to build a shopping center or1, 500 apartments that the tentative plan shows would be possible. If she builds a shopping center, there is a 70 percent chance that she can sell the shopping center to a large department store chain for \(4 million over her construction cost, which excludes the land; and there is a 30 percent chance that she can sell it to an insurance company for \)5 million over her construction cost (also excluding the land). If instead of the shopping center, she decides to build the 1,500 apartments, she places probabilities on the profits as follows:

There is a 60 percent chance that she can sell the apartments to a real estate investment corporation for \(3,000 each over her construction cost; there is a 40 percent chance that she can get only \)2,000 each over her construction cost. (Both exclude the land cost.)

If the land is not rezoned, she will comply with the existing zoning restrictions and simply build 600 homes, on which she expects to make $4,000 over the construction cost on each one (excluding the cost of land).

Draw a decision tree of the problem and determine the best solution and the expected net profit.
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