Forum Questions and Answers
Topic: PRISM Questions and Answers
Topic Posted by: SRC
Date Posted: Wed Jan 12 8:33:33 US/Eastern 2000
Topic Description: Welcome to the PRISM forum! Please feel free to post your questions and comments about the PRISM assessment software here.
Posted by: Boutbien laurent
Organization:MBDAM (Châtillon France)
Date posted: Wed Feb 27 4:59:54 US/Eastern 2002
Subject: query on Process Grade Score
First of all, thank you for your previous answer regarding the PRISM software guide. I am now able to have a better understanding of the PRISM philosophy analysis.
However, I have now a new question concerning the relation between the Process Grade Score query and the corresponding Pi-Factor. Answering the different queries for the Process Grade Score, I have noticed that there is no corresponding between the software true figures and the expected tabulated figures summarised in tables I-4 (page 262) and H-10 (page 247). In order to illustrate this remark , please find herefafter the result of the simulation :
Type Pi (software)Grade Pi (tables)
Design 0,0419 78,3% 0,039
Manufacturing 0,0347 83,6% 0,034
Part Quality 0,0795 89,3% 0,075
Management 0,0020 89,5% 0,002
CND 0,1460 76,2% 0,134
Induced 0,0272 100% 0,009
Wearout 0,0229 100% 0,008
growth 0,927 100% not tabulated
Infant Mortality 0,271 100% not tabulated
Moreover, How can you justify constant value for the growth factor and infant mortality factor despite the existence of mathematical formulae for determining these factors (Pi function of time).
Thank you for your assistance and help.