24. Each of the processes listed is non-centered with respect to the specifications for that process.Compute the appropri ate capability index for each, and decide if the process is capable.ProcessMeanStandard DeviationLower SpecUpper SpecH15.00.3214.116.0K33.01.0030.036.518.50.4016.520.125. An appliance manufacturer wants to contract with a repair shop to handle authorized repairsin Indianapolis. The company has set an acceptable range of repair time of 50 minutes to90 minutes. Two firms have submitted bids for the work. In test trials, one firm had a meanrepair time of 74 minutes with a standard deviation of 4.0 minutes and the other firm had amean repair time of 72 minutes with a standard deviation of 5.1 minutes. Which firm wouldyou choose? Why?

Answered: 24. Each of the processes listed is…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Suppose that a processoutput is normally distributed with a mean of 30.0 and a variance of 1.44. If the specifications are 30.0 /- 3.25, then compute process capability indices. Is the process capable of meeting specifications?
Is a capable process a perfect process? That is, does acapable process generate only output that meets specifications? Explain.
A customer has specified that they require a process capability of Cp= 1.5 for a certain product. Assume that USL = 1100, LSL = 700, and the process is centered within the specification range. a. What standard deviation should the process have? b. What is the process mean value? c. What can the company do if it is not capable of meeting these requirements?
Burger Doodle is a fast-food restaurant that processes anaverage of 680 food orders each day. The average cost of each order is $6.15. Four percent of the orders are incor-rect, and only 10% of the defective orders can be corrected with additional food items at an average cost of $1.75. Theremaining defective orders have to be thrown out.a. Compute the average product cost.b. In order to reduce the number of wrong orders,Burger Doodle is going to invest in a computerizedordering and cash register system. The cost of thesystem will increase the average order cost by $0.05and will reduce defective orders to 1%. What is theannual net cost effect of this quality-improvementinitiative?c. What other indirect effects on quality might be realizedby the new computerized order system?
86) PLEASE HELP ME WITH THIS Design specifications require that a key dimension on a product measure 106 = 11 units. A process being considered for producing this product has a standard deviation of four units. a. What can you say (quantitatively) regarding the process capability? Assume that the process is centered with respect to specifications.Note: Round your answer to 4 decimal places. b. Suppose the process average shifts to 97. Calculate the new process capability. Note: Round your answer to 4 decimal places.. c. What Is the probability of defective output after the process shift? Note: Use Excel's NORM.S.DIST function to find the correct probability. Round "z" values to 2 decimal places. Round y answer to 4 decimal places.
A process is in statistical control with = 202,5 y s = 2,0. Specifications are atLSL = 196 and USL = 206.a) Estimate the process capability with an appropriate process capability ratio.b) What is the potential capability of this process?c) Items that are produced below the lower specification limit must bescrapped, while items that are above the upper specification limit can bereworked. What proportion of the process output is scrap and whatproportion is rework?d) Because scrap is more expensive than rework, the process has been centered closer to the upper specification limit. If scrap is twice as expensive as rework, is the process mean at the best possible location? What value of the process target would you recommend?
A process has an estimate Sigma Capability of 3.8. What is the dpmo, assuming the process is shifted 1.5 sigma units from its target value?
Production. Consider again the task of the quality control inspectors in Exercise 22. a) In this context, what is meant by the power of the test the inspectors conduct? b) They are currently testing 5 items each hour. Someone has proposed that they test 10 instead. What are the advantages and disadvantages of such a change? c) Their test currently uses a 5% level of significance. What are the advantages and disadvantages of changing to an alpha level of 1%? d) Suppose that, as a day passes, one of the machines on the assembly line produces more and more items that are defective. How will this affect the power of the test? Exercise 22 Quality control. Production managers on an assembly line must monitor the output to be sure that the level of defective products remains small. They periodically inspect a random sample of the items produced. If they find a significant increase in the proportion of items that must be rejected, they will halt the assembly process until the…
The output from a process contains a 0.02 defective unit. Defective units that go undetected into final assemblies cost $25 each to replace. An inspection process, which would detect and remove all defectives, can be established to test these units. However, the inspector, who can test 20 units per hour, is paid $8 per hour, including fringe benefits. Should an inspection station be established to test all units?a. What is the cost to inspect each unit?b. What is the benefit (or loss) from the inspection process?
If the process capability ratio of a centered process is 0.7, and the process mean is 76, what is the average amount of defects per 1 million outputs? a. 16395 b. 35729 c. 71861 d. 51176
The upper and lower specification limits for a component are 5.20, and 5.30 ounces, respectively. The process standard deviation is .05, and the process average is 5.24 ounces. a) Calculate Cpk. (Show formula and calculations) b) Does the process posses six sigma capability? Why or Why not? Please explain.
A manufacturing process that is in control, reports Select one: a. Favorable variances offset by unfavorable variances. b. Mostly favorable variances c. All favorable variances. d. No variances.

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