jerry_Malaysia
Quite Involved in Discussions
Dear all,
I am new in learning about SPC. And I noticed that there are many methods that could be used to calculate Cpk value. However, when i input the same 50 data into different methods, Cpk value obtained are different. Please refer to attached file, that i have used same set of data for 4 different types of calculation methods.
Question is,
1) Is there anything wrong with the calculation method that i use?
2) Which is the correct / more suitable method to calculate Cpk value? Why?
3) What is the reason for getting different cpk value by using different methods?
I am new in learning about SPC. And I noticed that there are many methods that could be used to calculate Cpk value. However, when i input the same 50 data into different methods, Cpk value obtained are different. Please refer to attached file, that i have used same set of data for 4 different types of calculation methods.
Question is,
1) Is there anything wrong with the calculation method that i use?
2) Which is the correct / more suitable method to calculate Cpk value? Why?
3) What is the reason for getting different cpk value by using different methods?