Concept explainers
a
Interpretation:
Expected number of microprocessors when true proportion of detectives in lot is 0.1%
Concept Introduction:
Average Sample Number curve (ASN) curve gives the expected
b
Interpretation:
Expected number of microprocessors when true proportion of detectives in lot is 1%
Concept Introduction:
Average Sample Number curve (ASN) curve gives the expected sample size for a sequential sampling plan as a function of p.
b
Interpretation:
Expected number of microprocessors when true proportion of detectives in lot is 10%
Concept Introduction:
Average Sample Number curve (ASN) curve gives the expected sample size for a sequential sampling plan as a function of p.
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Production and Operations Analysis, Seventh Edition
- A manufacturing company has been inspecting units of output from a process. Each prod uct inspected is evaluated on five criteria. If the unit does not meet standards for the criteria it counts as a defect for the unit. Each unit could have as few as zero defects, and as many as five. After inspecting 2,000 units, they discovered 33 defects. What is the DPMO measure for this process?arrow_forwardBased on the 6-Sigma methodology, what is the corresponding DPMO when the Sigma Quality Level is 4.5 and process mean shifts by 10? 1.96 DPMO 3.4 DPMO 32 DPMO 233 DPMO 66800 DPMOarrow_forwardA six-sigma green belt candidate finds P/T ratio of his gauge as 0.632. The gauge has no bias. He tried improving his gauge precision, but failed to do so. He plans to use averages of repeated measurements in his quality improvement project. How many repeated measurements does he need to make on a part to have a P/T ratio of 0.200 based on the measurement averages? Answer:arrow_forward
- Sam’s Long Life 75-watt light bulbs are designed tohave a life of 1125 hours with tolerances of 210 hours.The process that makes light bulbs has a mean of 1050hours, with a standard deviation of 55 hours. Computethe process capability ratio and the process capabilityindex, and comment on the overall capability of theprocess.arrow_forwardMeena Chavan Corp.’s computer chip productionprocess yields DRAM chips with an average life of 1,800 hoursand s = 100 hours. The tolerance upper and lower specification limits are 2,400 hours and 1,600 hours, respectively. Is this pro-cess capable of producing DRAM chips to specification?arrow_forwardYou work for Raider Data Systems where thousands of insurance records are entered by clerks each day for a variety of client firms. You are in charge of setting control limits to include 99.73% of the random variation in the data entry process when it is in control. Samples that you collected from 20 employees are shown below. You carefully examine 100 records entered by each employee and count the number of errors entered by each clerk. You also compute the proportion defective in each sample. Using a p-chart, what are the upper and lower control limits? Sample Errors Made Proportion Defective 1 4 0.04 2 5 0.05 3 6 0.06 4 3 0.03 5 8 0.08arrow_forward
- Fearless Inc. has designed and tested 400 Super Sucker Vacuum Cleaner models. All of them were operated for 1,000 hours at Lubbock's Fearless test facility. Out of all the vacuums 2 of them failed during the test. One of them after 900 hours and the other after 500 hours. What is this product estimated Mean Time Between Failures?arrow_forwardCanine Gourmet Super Breath dog treats are sold in boxes labeled with a net weight of 9 ounces (255grams) per box. Each box contains 6 individual 1.5-ounce packets. To reduce the chances of shorting thecustomer, product design specifications call for the packet-filling process average to be set at 43.0 grams so that the average net weight per box of 6 packets will be 258 grams. Tolerances are set for the box to weigh 258±12 grams. The standard deviation for the packet-filling process is 1.01 grams. The target process capability ratio is 1.33. One day, the packet-filling process average weight drifts down to 42.5 grams. Is the packaging process capable? Is an adjustment needed? Since the process capability index, Cpk,is ?,the process is capable?is not capable? (Enter your response rounded to three decimal places.)arrow_forwardIn quality assurance, we use c-charts for quality characteristics that are discrete and involve yes/no or good/bad decisions. True or False. Why?arrow_forward
- In an FMEA, we determined Severity, Occurrence and Detection numbers for two types of failure, as shown below:Group of answer choices Missed Deposits RPN = 80, Billing Errors RPN = 84, Missed Deposits is priority Missed Deposits RPN = 80, Billing Errors RPN = 84, Billing Errors is priorityarrow_forwardA spring water factory ensures that each water bottle contains precisely 16.9 fluid ounces with an acceptable margin of error of 0.1 fluid ounces. If the standard deviation of the water bottles is 0.06 fluid ounces, what is the process capability ratio (Cp) of the water bottles? 0.56 01 1.2 1.67arrow_forwardA certain process is under statistical control and has a mean value of μ = 130 and a standard deviation of σ = 8. The specifications for this process are USL = 150, LSL = 100.a. Calculate Cp and Cpk.b. Which of these indices is a better measure of process capability? Why?c. Assuming a normal distribution, what percent of the output can be expected to fall outside the specifications?arrow_forward
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