Statistical Process Control (SPC) has been based on sampling because of the difficulty of data collection and data analysis. However, with automated dimensional measurement systems, every part produced can be measured, resulting in 100 % measurement. The impact of 100 % measurement data on Statistical Process Control in three areas is presented using case studies from an automobile body assembly process. These areas area: (1) Process monitoring and surveillance; (2) Process parameter identification; and (3) Process variation reduction. Six cases are illustrated. They include: (1) sporadic jumps, (2) sustained mean shift, (3) mean shift detection using Prediction Error Analysis (PEA), (4) multivariate analysis, (5) modeling by exponential smoothing, and (6) variation reduction in side frame subassembly.
Impact of 100 % in-process measurement on statistical process control (SPC) in automobile body assembly
Einfluß der 100 % Teilemessung während der Fertigung auf die statistische Prozeßkontrolle bei der Karosseriemontage
1990
16 Seiten, 17 Bilder, 2 Tabellen, 20 Quellen
Conference paper
English
STATISTISCHE PROZESSREGELUNG , AUTOMATISCHES MESSEN , KAROSSERIE , LAENGENMESSUNG , PROZESSUEBERWACHUNG , PROZESSSTEUERUNG , MITTELWERT , VERFAHRENSPARAMETER , FEHLERRECHNUNG , STATISTISCHES VERFAHREN , MONTAGE , STATISTISCHER KENNWERT , QUALITAETSKONTROLLE , FERTIGUNGSGENAUIGKEIT , FERTIGUNGSFEHLER , QUALITAETSSICHERUNG
Design of a Process Control System for Automobile Assembly Process
Automotive engineering | 1979
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