Please answer the following True or False questions 1) A process is capable if s
ID: 2747023 • Letter: P
Question
Please answer the following True or False questions
1) A process is capable if special cause variation is not present in the process.
2) Random variation is also referred to as uncontrollable variation.
3) Control charts are used to determine if there are unexpected variation in the process.
4) Three items in parallel, each having a reliability of 0.90have an overall system reliability of 0.999.
5) The lower control limit for an R-chart can be lower than 0.
6) Process stability means that there is no common variation in the process.
7) Effective benchmarking must be against the best company in the same industry.
8) A Six Sigma process must have a process capability index of 2.0 or higher.
9) In a Normally distributed process the mode and the mean have the same value.
10) Quality invariably leads to better financial results.
Explanation / Answer
1) A process is capable if special cause variation is not present in the process. - True
2) Random variation is also referred to as uncontrollable variation. - True
3) Control charts are used to determine if there are unexpected variation in the process. - False (It is used to determine whether the process is within control limits)
4) Three items in parallel, each having a reliability of 0.90have an overall system reliability of 0.999. - False
Explanation - Reliability of parallel items = 1- (1-R)^2 = 0.99
5)The lower control limit for an R-chart can be lower than 0. - False ( LCL for an R chart = D3*R_Bar ; Value of D3 is always positive)
6)Process stability means that there is no common variation in the process. - False ( It means there is only common variation in the process)
7) Effective benchmarking must be against the best company in the same industry. - True
8) A Six Sigma process must have a process capability index of 2.0 or higher.- False
9) In a Normally distributed process the mode and the mean have the same value.- True
10) Quality invariably leads to better financial results. - True