How many reserve gallons should be provided

Assignment Help Basic Computer Science
Reference no: EM131248901

Freedom Express (FreeEx), affectionately known as the Filibuster Fly, is a small commuter airline based in Washington, D.C., that serves the U.S. East coast. It runs nonstop flights between several cities and Reagan National Airport (DCA).
DCA frequently is congested, and at such times, planes are required to fly in a "stack" over the field. In other words, planes in the process of landing and those waiting for permission to land are deployed above the field
FreeEx management is interested in determining how long its planes will have to wait so that an adequate amount of fuel can be loaded before departure from the outlying city to cover both the intercity flying time and the time in the stack. Excess fuel represents an unnecessary cost, however, because it reduces the payload capacity. Equally important is the present cost of aviation fuel, $2.80 per gallon, and an average consumption rate of 20 gallons per minute

The rate of arrival for all planes at DCA varies by the hour. The arrival rate and time in the stack are greatest each weekday between 4 and 5 PM. and so FreeEx selected this time period for an initial study.

The study indicated that the mean arrival rate is 20 planes per hour, or one every 3 minutes. The variance about this mean, resulting from flight cancellations as well as charter and private flights, is characterized by a Poisson distribution.

During clear weather, the DCA control tower can land 1 plane per minute, or 60 planes per hour. Landings cannot exceed this rate in the interest of air safety. When the weather is bad, the landing rate is 30 per hour. Both good-and bad-weather landing rates are mean rates with a Poisson distribution. FreeEx's flights are short enough that management usually can tell before takeoff in an outlying city whether or not the rate of landings in DCA will be reduced because of weather considerations
When a plane runs short of fuel while in the stack, it is given priority to land out of order. DCA rules, however, make clear that the airport will not tolerate abuse of this consideration. Therefore, FreeEx ensures that its planes carry enough fuel so that it will take advantage of the policy no more than 1 time in 20.

Questions

1. During periods of bad weather, as compared with periods of clear weather, how many additional gallons of fuel on average should FreeEx expect its planes to consume because of airport congestion?

2. Given FreeEx's policy of ensuring that its planes do not run out of fuel more than 1 in 20 times while waiting to land, how many reserve gallons (i.e., gallons over and above expected usage) should be provided for clear-weather flights? For bad-weather flights?

3. During bad weather, FreeEx has the option of instructing the Washington air controller to place its planes in a holding pattern from which planes are directed to land either at Reagan National or at Dulles International, whichever becomes available first. Assume that the Dulles landing rate in bad weather also is 30 per hour, Poisson distributed, and that the combined arrival rate for both airports is 40 per hour. If FreeEx must pay $200 per flight to charter a bus to transport its passengers from Dulles to Reagan National, should it exercise the option of permitting its aircraft to land at Dulles during bad weather? Assume that if the option is used, FreeEx's aircraft will be diverted to Dulles about onehalf the time.

Reference no: EM131248901

Questions Cloud

Does school provide maximum benefit or educational benefit : Do you think the IEP for the student was reasonably calculated and, if not, what revisions would you suggest? Does your school provide ‘maximum benefit’ or ‘educational benefit’? (NCLB = maximum benefit; IDEA/IDEIA = educational benefit.) On the issu..
What you understand and the explanation of the book : Summarise what you understand and the explanation of the book. Book: The pulse of wisdom second edition, the philosophies of India and china and Japan
Describe your reaction to the given video : After watching the video, describe your reaction to the video and the implications to your own work. What did you learn about the seriousness of plagiarism and how did this video change (or not) your understanding of it?
Responsible for injuries caused by property : Ben and his family brought suit against the city of Detroit to recover damages for his injuries. Could the city be held responsible for injuries caused by property owned by someone else? Why or why not?
How many reserve gallons should be provided : The rate of arrival for all planes at DCA varies by the hour. The arrival rate and time in the stack are greatest each weekday between 4 and 5 PM. and so FreeEx selected this time period for an initial study.
What are qa and qb : Suppose that B goes first and selects qB. Then after observing qB, A follows and selects qA. Both firms know the demand curve. What are qA and qB?
Jeopardy with ashley judd and tommy lee jones : You may need to refer to the United States Constitution and some additional resources about double jeopardy. How many of you have seenDouble Jeopardy with Ashley Judd and Tommy Lee Jones?
Write an essay about adaptive physical education : Write an essay about Adaptive physical education. At least one aspect of the annotated bibliography project that concerns you or one aspect of the annotated bibliography project that excites you.
Perception of its employees by customers : A bank in a small town is concerned with the perception of its employees by customers and others in the community. Branch managers are responsible for both the running of the branches and building community relationships.

Reviews

Write a Review

 

Basic Computer Science Questions & Answers

  Why are computer systems so vulnerable

Is security a technical issue? A business issue? Both? Support your answer. (Hint: Read Kim Nash, "Why Technology Isn't the Answer to Better Security,"CIO www cio com October 15, 2008.

  How light source is treated during ray tracing processing

Typically, this setting is left at default until final renderings are being produced. To reduce gaps or facets in rendering which setting do you adjust?

  The real reasons why the vcf system failed

The real reasons why the VCF system failed?

  Develop a wbs plan for estimating the project

The information then is presented in a résumé format, and it also is placed in a database that can be queried through an online search form. You have been placed in charge of the project. Develop a WBS plan for estimating the project.

  Framing rules work if stuffing rule to stuff zero changes

Will framing rules work if we change stuffing rule to stuff a zero only after 6 consecutive ones? Describe. Will protocol work if we change stuffing rule to stuff 0 only after a zero followed by 5 consecutive ones? Describe.

  Define and implement a class pen that has instance of ball

Provide several members for the class Pen, such as the data member color and methods is Empty and write

  How can a business use the internet

Select four Internet browsers and provide three positive and 3 negative features about each, summarize your findings.

  Worldwide database of domain names

1. Servers that host part of the Domain Name System are called domain name servers, or DNS servers True or False? 2. Some sites on the Internet have the same IP address True or False? 3. The worldwide database of domain names and corresponding IP add..

  Generic post-implementation evaluation form

Design a generic post-implementation evaluation form. The form should consist of questions that you could use to evaluate any information system. The form should evaluate the post-implementation activities and any problems associated with the impl..

  Receive funding for select planning projects

Imagine that you are trying to receive funding for select planning projects. Compare and contrast the attributes of business continuity and disaster recovery plans, and suggest the primary ways in which you would explain these differences to yo..

  Compute the sample size to achieve 80 percent power

Describe how you would compute the sample size to achieve 80% power, alpha = .05, and the appropriate effect size.

  Compute the annual depreciation allowances

Consider the following date on an asset: Cost of the asset, I: $150,000, Useful life, N: 5 years and Salvage value, S: $16,000. Compute the annual depreciation allowances

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd