Homework Answers
False
The process capability ratio Cp = (Upper Specification Limit - Lower Specification Limit)/6*Standard deviation
Although the UCL is three sigma levels above the mean and LCL is 3 sigma levels below the mean.
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Question 15 (1 point) The process capability ratio (Cp) of a Six Sigma Program is 2....
Six Sigma corresponds to Process Capability Index Cp = 1. True or False?
Six Sigma corresponds to Process Capability Index Cp = 1. True or False?
How is process capability measured? • A. By comparing control limits to specification limits • B....
How is process capability measured? • A. By comparing control limits to specification limits • B. By creating a ratio between specification limits and control limits relevant to six sigma • C. By using the Cp formula • D. All the above
Lean Six Sigma The Lower Specification Limit is 8.0 seconds 36. Representative data gathered from a process that follow...
Lean Six Sigma
The Lower Specification Limit is 8.0 seconds
36. Representative data gathered from a process that follows a normal distribution shows a mean of 8.2 seconds with a standard deviation of 0.3 seconds. The process has 8.5 seconds as an upper specification limit. What is the process yield? a. Calculate: Cp and Cpk b. How many defects per million opportunities the process produces? (hint: use the Excel spreadsheet given in class) c. What is the Sigma of the...
A key joint in a precision machining process has a lower specification limit of a width...
A key joint in a precision machining process has a lower specification limit of a width of 0.99 mm and an upper specification limit of 1.01 mm. The standard deviation is 0.005 mm and the mean is 1 mm. The company wants to reduce its defect probability and operate a "Six Sigma process." To what level would this company have to reduce the standard deviation in the process to meet this target? Note: A "Six Sigma process" has a process...
The Money Pit Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen...
The Money Pit Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen samples of five completed mortgage transactions each were taken during a period when the process was believed to be in control. The times to complete the transactions were measured. The Money Pit Mortgage Company made some changes to the process and undertook a process capability study. The following data were obtained for 15 samples of size 5. Based on the individual observations, management estimated...
using excel 10 pts Question 2 2. [10 points] For a given service process, order response...
using excel
10 pts Question 2 2. [10 points] For a given service process, order response time data provides a mean value of 16 and a standard deviation of 4 as point estimates. Tolerance (that is Specification) limits are specified as UTL (USL) - 26 and LTL (LSL) = 4 a) What percent of orders that this enterprise processes do not meet the response time specifications? Assume any response time that falls outside the tolerance (specification) limits is a defective...
QUESTION 25 (10 points) ‐ Process Capability Indexes A ball bearing design for wheel assemblies used...
QUESTION 25 (10 points) ‐ Process Capability Indexes A ball bearing design for wheel assemblies used in giant mining dump trucks requires the inner diameter to have a lower specification unit (LSL) of 1,097.50 mm and an upper specification unit (USL) of 1,102.50 mm. A simple random sample of 270 finished ball bearings, which were produced by an approximately normally distributed process, has the sample average of 1101.20 mm and the sample standard deviation of 0.60 mm. A too small...
QUESTION 25 (10 points) Process Capability Indexes A ball bearing design for wheel assemblies used in...
QUESTION 25 (10 points) Process Capability Indexes A ball bearing design for wheel assemblies used in giant mining dump trucks requires the inner diameter to have a lower specification unit (LSL) of 1,097.50 mm and an upper specification unit (USL) of 1,102.50 mm. A simple random sample of 270 finished ball bearings, which were produced by an approximately normally distributed process, has the sample average of 1101.20 mm and the sample standard deviation of 0.60 mm. A too small inner...
54 A manufacturing process for the company producing wheel bearings was investigated Samples of 4 subgroups...
54 A manufacturing process for the company producing wheel bearings was investigated Samples of 4 subgroups where tested each containing 6 wheel bearings The specification limits for the process are given as 40 and 5 2 Given the following data for random measurements taken on the wheel bearing dunng their three shifts 56 54 Subgroup 1 Subgroup 2 Subgroup 3 59 50 48 52 51 50 464258 52 57 50 543 56 47 | 49 Subgroup 4 55 51 50...
For a key joint, a precision machining process has a lower specification limit of a width...
For a key joint, a precision machining process has a lower specification limit of a width of 0.99 mm and an upper specification limit of 1.01 mm. The standard deviation is 0.005 mm and the mean is 1 mm. (a) What is the process capability index for the bottle filling process? (Round the answer to 3 decimal places.) (b) The company now wants to reduce its defect probability and operate a “six sigma process.” To what level would they have...
Lean Six Sigma
The Lower Specification Limit is 8.0 seconds
36. Representative data gathered from a process that follows a normal distribution shows a mean of 8.2 seconds with a standard deviation of 0.3 seconds. The process has 8.5 seconds as an upper specification limit. What is the process yield? a. Calculate: Cp and Cpk b. How many defects per million opportunities the process produces? (hint: use the Excel spreadsheet given in class) c. What is the Sigma of the...
using excel
10 pts Question 2 2. [10 points] For a given service process, order response time data provides a mean value of 16 and a standard deviation of 4 as point estimates. Tolerance (that is Specification) limits are specified as UTL (USL) - 26 and LTL (LSL) = 4 a) What percent of orders that this enterprise processes do not meet the response time specifications? Assume any response time that falls outside the tolerance (specification) limits is a defective...
QUESTION 25 (10 points) Process Capability Indexes A ball bearing design for wheel assemblies used in giant mining dump trucks requires the inner diameter to have a lower specification unit (LSL) of 1,097.50 mm and an upper specification unit (USL) of 1,102.50 mm. A simple random sample of 270 finished ball bearings, which were produced by an approximately normally distributed process, has the sample average of 1101.20 mm and the sample standard deviation of 0.60 mm. A too small inner...
54 A manufacturing process for the company producing wheel bearings was investigated Samples of 4 subgroups where tested each containing 6 wheel bearings The specification limits for the process are given as 40 and 5 2 Given the following data for random measurements taken on the wheel bearing dunng their three shifts 56 54 Subgroup 1 Subgroup 2 Subgroup 3 59 50 48 52 51 50 464258 52 57 50 543 56 47 | 49 Subgroup 4 55 51 50...
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