S
Sindwani
1. If Cpk gives only capability(can do) of process and Ppk gives the true performance(actually doing), isn't it correct to use Ppk only ?
2. Also do I need to prove normality of data & control of process (thru c ontrol charts) before calculating Ppk/Cpk?
3. Is Cpk or Ppk calculated over time like based on daily/weekly/monthly data ?
Thanks,
2. Also do I need to prove normality of data & control of process (thru c ontrol charts) before calculating Ppk/Cpk?
3. Is Cpk or Ppk calculated over time like based on daily/weekly/monthly data ?
Thanks,