A system operates for 11 consecutive hours. During this period, four failures occurred that, in total, resulted in 54 minutes of unavailability (downtime). Calculating the MTBF (Mean Time Between Failures) in hours and enter below with two digits of precision, e.g., 23.45.
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- Output from a process contains 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? Assume that the line will operate at the same rate (i.e., the current production rate) regardless of whether or not the inspection operation is added. a-1. Without the inspector, what is the current hourly cost of defects? a-2. Should an inspection station be established to test all units based on costs alone? multiple choice Yes No a-3. If the inspection operation is added, what would be the cost to inspect each unit? Note: Round your answer to 2 decimal places. b. What would be the benefit (or loss) from establishing the inspection process? Note: Round your answer…Output from a process contains 0.01 proportion of defective units. Defective units that go undetected into final assemblies cost $26 each to replace. An inspection process, which would detect and remove all defectives, can be established to test these units. The inspector, who can test 21 units per hour (which matches the current production rate), would be paid $9 per hour, including fringe benefits. Assume that the line will operate at the same rate (i.e., the current production rate) regardless of whether or not the inspection operation is added. A. Without the inspector, what is the current hourly cost of defects? (Round your answer to 2 decimal places.) B. If the inspection operation is added, what would be the cost to inspect each unit? (Round your answer to 2 decimal places.) C. What would be the benefit (or loss) from establishing the inspection process per unit? (Input the amount as a positive value. Round your answer to 2 decimal places.)69 Output from a process contains 0.02 defective unit. Defective units that go undetected into final assemblies cost $25 each to replac An inspection process, which would detect and remove all defectives, can be established to test these units. However, the inspector, who can test 22 units per hour, is paid $10 per hour, including fringe benefits. Should an inspection station be established to test all units? ume that the line will operate at the same rate (i.e., the current production rate) regardless of whether or not the inspection ration is added. a-1. Without the inspector, what is the current hourly cost of defects? Note: Round your answer to 2 decimal places. a-2. Should an inspection station be established to test all units based on costs alone? a-3. If the inspection operation is added, what would be the cost to inspect each unit? Note: Round your answer to 2 decimal places.
- Suppose that you have a four-sided die that is equally weighted (i.e. equal chance of any of the four sides landing face up). The four values on the die are [12.5968, 2, -2 and -12.5968] . If we roll the die 81 times, record the average, and repeat this process a total of 100 times, what does the central limit theorem predict will be the distribution of the averages? a) x-bar ~ N(0, 9) b) x-bar ~ N(12.59, 1) c) x-bar ~ N(0, 81) d) x-bar ~ N(0, 1)The warehouse management system (WMS) of RoyaTech's Delaware Valley warehouse tracks service level at the warehouse. A service level failure at the warehouse is an event where a customer's order could not be shipped out in full by the promised shipping time. RoyalTech's ordering system prevents customers from placing orders on products that are not in-stock at the warehouse. Therefore, we can make the statement that "the WMS is guaranteed to show 100% service level at the warehouse." Choose the most appropriate statement in response: O True, because orders will be placed only for products that are available. O False, because service level can never be 100%. O False, because resource constraint or human error may delay the shipping even though inventory is available in the system. O False, because WMS calculations are faulty.A fastfood joint offers a home delivery with a promise of 20 minute window for delivery. On a particular day there was considerable delay in delivery on account of heavy traffic in the city. Since several customers started calling the fastfood joint, the unit manager put the phone in automatic answering mode, which merely repeated "We are on our way to your place". Which of the following statements are true with respect to the service quality? The customers would not have been affected much by this behavior as they have been given a response The service quality will not be affected as the fastfood joint was not responsible for the delay The Manager has made use of the available technology and communicated appropriately to all the customers This is an example of how service quality will be also evaluated on the process and not just the outcome
- A machine is set to pump cleanser into a process at the rate of 5 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 5.0 to 8.0 gallons per minute. Would you expect the machine to pump more than 7.85 gallons per minute?The mean repair time of a reproduction machine every time it becomes defective is 5 hours, and is assumed to be available 95% of the time. What is its mean time between failure (MTBF)?Yelp Dog Food produces specialized dog foods in 1-pound packages. The amount of dog food in each package should be 1 pound, and Yelp has determined that the standard deviation of the machine filling these packages is half an ounce, and the confidence interval is 14.85% (z = .1872). In order to confirm that the machine is operating properly, Yelp takes 16 sample bags every hour and weighs them. The means of these 16 bags for an 8-hr shift is given below. 1 2 3 4 5 6 7 8 0.98 1.01 0.97 1.03 1.01 0.94 1.02 1.02 NARREND What would be the lower control limit? .9038 .9567 .9741 .9892
- Yelp Dog Food produces specialized dog foods in 1-pound packages. The amount of dog food in each package should be 1 pound, and Yelp has determined that the standard deviation of the machine filling these packages is half an ounce, and the confidence interval is 14.85% (z = .1872). In order to confirm that the machine is operating properly, Yelp takes 16 sample bags every hour and weighs them. The means of these 16 bags for an 8-hr shift is given below. 1 2 3 4 5 6 7 8 0.98 1.01 0.97 1.03 1.01 0.94 1.02 1.02 NARREND How many, if any, of the hours were out of control? 0 2 3 7The K of a proportional controller is 30 and the reference value is 50% of the output. A valve is used at its outlet that, for the reference value, allows a flow of 2.0 m?/s. The valve changes its output in direct proportion to the controller output. What will be the controller output and deviation in error when the flow is to change to 2.5 m/s?A copier machine has a mean time between failures of 400 operating hours. Repairs typicallyrequire an average of 10 hours from the time that the repair call is received until service is completed. Determine the availability of this copier