Concept explainers
a)
To draw: A cause and effect diagram for the given situation.
Introduction:
Cause and effect diagram:
It is a diagrammatic tool used to identify different causes for a problem. It visually displays the various causes for a problem and its consequent effect.
b)
To draw: A cause and effect diagram for the given situation.
Introduction:
Cause and effect diagram:
It is a diagrammatic tool used to identify different causes for a problem. It visually displays the various causes for a problem and its consequent effect.
c)
To draw: A cause and effect diagram for the given situation.
Introduction:
Cause and effect diagram:
It is a diagrammatic tool used to identify the different causes for a problem. It visually displays the various causes for a problem and its consequent effect.
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OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
- A maintenance group wants to increase the effectiveness of the repair work by tracking the number of maintenance requests that require a second call to complete the repair. The table below shows the data for 20 weeks. Is this process under control in terms of the rate of maintenance requests requiring a second call? Indicate whether the process is under control by drawing appropriate control charts / graphs.arrow_forwardBurger 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?arrow_forwardA quality control scheme is in operation for a process producing ball-bearings. Samples of 6 bearings are taken every hour and bearing diameters are measured. The mean diameter delivers is 2 cm with standard deviation of 0.002 cm. To bearing diameter specification is within the range of 1.998cm to 2.002cm. a. Calculate the process capability for the ball bearings production process . b. Suggest two proposal to improve the process capability. c. What value of standard deviation will deliver a six sigma process ?arrow_forward
- What’s the difference between Type I and Type II error?arrow_forwardProblem 13-4 (Algo) There is a 3 percent error rate at a specific point in a production process. If an inspector is placed at this point, all the defects can be detected and eliminated. The inspector would cost $11 per hour and could inspect units in the process at the current production rate of 52 per hour. If no inspector is hired and defects are allowed to pass this point, there is a cost of $12 per defective unit to correct the defects later on. Assume that the line will operate at the same rate (i.e., the current production rate) regardless of whether the inspector is hired or not. a. If an inspector is hired, what will be the inspection cost per unit? (Round your answer to 3 decimal places.) Cost per unit b. If an inspector is not hired, what will be the defective cost per unit? (Round your answer to 3 decimal places.) Cost per unitarrow_forwardGE adopted Six Sigma from Motorola in 1995, Which of the following is not an advantage of using Six Sigma: Select one: O A. Process improvement O B. A decrease in customer satisfaction O C. Product improvement O D. Defect reduction Next pagearrow_forward
- What is an operational definition of quality? Is it possible for a 13-inch TV selling for $100 to be of superior quality to a 50-inch console selling for $1,800?arrow_forwardces Inter-State Moving and Storage Company wishes to establish a control chart to monitor the proportion of residential moves that result in written complaints due to late delivery, lost items, or damaged items. A sample of 50 moves is selected for each of the last 12 months. The number of written complaints in each sample is 8, 7, 4, 8, 2, 7, 11, 6, 7, 6, 8, and 12. Click here for the Excel Data File a. Insert the mean proportion defective, UCL, and LCL (Leave no cells blank - be certain to enter "0" wherever required. Round your intermediate calculations and final answers to 2 decimal places.) Mean proportion defective UCL LCL c. Does it appear that the number of complaints is out of control for any of the months? Yes ONOarrow_forward4. A soda drink bottling company is interested in winning a contract with a popular drink brand. To win the contract the company must show that it is capable of meeting 6o quality. The contract is for the production of 355mL cans, for which a tolerance of +0.5mL is specified. The company believes the facility is in statistical control and has calculated a global value of R 0.15mL and 355.025mL for its production system. The com- pany ran a capability test by obtaining 10 samples (each of 8 elements) on which capability calculations will be performed. The data obtained is in the following table: Sample R Sample F R 0.18319 354.98938 0.15714 355.02304 B 0.15361 355.01149 G 0.19205 355.06814 0.14892 355.00997 H 0.16240 355.05145 0.19912 355.01490 I 0.19179 355.00207 E 0.18389 355.04694 J 0.11900 355.02327 The parameters A2, D3 and D4 for various n are shown in the following table. A2 2 1.880 3.268 3 1.023 2.574 4 0.729 2.282 5 0.577 2.115 6 0.483 2.004 D3 D3 0.419 1.924 0.076 A2 D4 0. 7.…arrow_forward
- Different types of alarms involved in the process industry.arrow_forwardVera Johnson and Merris Williams manufacture vanishing cream. Their packaging process has four steps: (1) mix, (2) fill, (3) cap, and (4) label. They have had the reported process failures analyzed, which shows the following:Process failure FrequencyLumps of unmixed product 7Over- or underfilled jars 18Jar lids did not seal 6Labels rumpled or missing 29 Total 60 Draw a Pareto chart to identify the vital failures.arrow_forwardDefine, compare and contrast type 1 and type 2 error?arrow_forward
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