Determining sample size for specification limits verification with tolerance intervals

2021 ◽  
Author(s):  
Alessandro Vasta
Keyword(s):  
Sample Size ◽  
Tolerance Intervals ◽  
Specification Limits

A New Fuzzy Process Capability Index for Asymmetric Tolerance Interval

2017 ◽  
Vol 6 (3) ◽  
pp. 74-104 ◽  
Author(s):  
Zainab Abbasi Ganji ◽  
Bahram Sadeghpour Gildeh
Keyword(s):  
Process Capability ◽  
Process Capability Indices ◽  
Tolerance Interval ◽  
Tolerance Intervals ◽  
Specification Limits ◽  
Target Value ◽  
Fuzzy Process ◽  
Capability Indices ◽  
And Performance ◽  
Fuzzy Process Capability

Process capability indices are used to evaluate the performance of the manufacturing process. When the specification limits and the target value are not precise, the authors cannot use the traditional methods to assess the capability of the process. For the processes with asymmetric tolerance intervals, some fuzzy process capability indices have been introduced such as and . In some cases, these indices may fail to account the process performance. To overcome the problem with them, the authors propose two new fuzzy indices in the case that the specification limits and the target value are fuzzy while the data are crisp. Also, the authors present an application example to demonstrate effectiveness and performance of the proposed indices.

Sample size determination strategies for normal tolerance intervals using historical data

2016 ◽  
Vol 28 (3) ◽  
pp. 337-351 ◽  
Author(s):  
Derek S. Young ◽  
Charles M. Gordon ◽  
Shihong Zhu ◽  
Bryan D. Olin
Keyword(s):  
Sample Size ◽  
Historical Data ◽  
Sample Size Determination ◽  
Size Determination ◽  
Tolerance Intervals
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