1. Process parameters and product characteristics to be controlled
1.1 Process parameters
To control a process, it is necessary to work on the parameters of that process rather than on the characteristics of the product, i.e. to identify cause-effect relationships and quantify them at least summarily (for example, the effect of temperature on the viscosity of a polymer).
Various tools can be used for this research, including :
fault tree or cause tree ;
cause-effect diagram (also called "fishbone" or "Ishikawa" diagram);
correlation and regression studies ;
experience plans ;
data analysis: principal components...
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Process parameters and product characteristics to be controlled
Process variability
Bibliography
Reference
Other
Standardization
- Sampling rules for attribute checks – Part 1: sampling procedures for lot-by-lot inspection, indexed by acceptable quality level (AQL). - NF ISO 2859-1 - 4-00
- Sampling rules for attribute checks – Part 3: Partial successive sampling procedures. - NF ISO 2859-1 - 10-05
- Sampling rules for attribute checks – Part 4: procedures for assessing declared quality levels. - NF ISO 2859-4 - 5-03
- Sampling rules...
Organizations
Mouvement français pour la qualité (MFQ) http://www.mfq-fc.asso.fr
American Society for Quality (ASQ) http://www.asq.org
European Organization for Quality (EOQ) http://www.eoq.org
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