From: Stan Hilliard
Date: 27 Nov 2003
Time: 00:10:09
Lane,
I calculated some confidence limits for the process using reports generated by our software program ASP: www.samplingplans.com/software_me.htm
95% confidence limits for n=384 transactions/team
X=Defective per team
LCL=Lower 95% confidence limit of the process percent defective
UCL=Upper 95% confidence limit of the process percent defective
X _LCL ___UCL
0 ____% 0.78%
1 0.01% 1.44%
2 0.06% 1.87%
3 0.16% 2.27%
4 0.28% 2.64%
5 0.42% 3.01%
Below is a similar analysis for team-members
95% confidence limits for n=384/8=48 transactions per team member
X=Defective per team member
LCL=Lower 95% confidence limit of the process percent defective
UCL=Upper 95% confidence limit of the process percent defective
X _LCL __ UCL
0 0.__% 6.05%
1 0.05% 11.07%
2 0.51% 14.25%
3 1.31% 17.20%
4 2.32% 19.98%
5 3.47% 22.66%
You could use our software program ASP to generate reports for specific time periods and subgroups based on your own data.
www.samplingplans.com/software_me.htm