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Human factors in visual quality control

Kujawińska A., Vogt K.

Management and Production Engineering Review

2015

Vol. 6, No. 2

25--31

Visual control (visual inspection) is often used in production because - in comparison to other kinds of control - it is relatively easy to conduct. It does not require any specialized technical equipment. Human senses, usually sight, are the measurement tool. Unfortunately, visual control does not guarantee a fully correct assessment. The reason is the limited human reliability. There are plenty of factors which influence ability of a human to assess the process or product quality properly. An important group of them are ergonomic factors. The goal of the paper is to identify and discuss their influence on the efficiency of the visual quality control in manufacturing processes. The research was carried out in manufacturing company from automotive industry. The paper presents the investigation of work organizational factors influence on visual control effectiveness. A controller can make two types of errors in the process of visual inspection: to assess a conforming product as “defective” or to assess a non-conforming product as “good”. Effectiveness of sequential visual controls in selected process was examined. As a measure of visual control effectiveness Control First Pass Yield index was defended. Three operations were analyzed: assembly of components, melting components and applying a protective coating.

Analiza wpływu wybranych czynników pracy na skuteczność kontroli wzrokowej

Vogt K., Kujawińska A.

Inżynieria Maszyn

2013

R. 18, z. 1

40--50

W artykule zaprezentowano wyniki analizy wpływu czynników organizacji pracy oraz sposobu ulokowania niezgodności w wyrobie na skuteczność kontroli wzrokowej. Szczegółowo zaprezentowano wyniki eksperymentu, przeprowadzonego w przedsiębiorstwie produkującym elektronikę dla branży motoryzacyjnej. Badano skuteczność sekwencji kontroli wizualnych, usytuowanych w wybranym procesie technologicznym. Oceniano wpływ zmiany produkcyjnej, rodzaju niezgodności, oraz umiejscowienia i organizacji kontroli wzrokowej na jej skuteczność. Stwierdzono dominację wpływu czynników zależnych od kontrolera na skuteczność kontroli.

The paper presents the investigation of work organizational factors influence on visual control effectiveness. It describes results of the experiment performed in company manufacturing electronics for automotive industry. A controller can make two types of errors in the process of visual inspection: to assess a conforming product as "defective" or to assess a non-conforming product as "good". Effectiveness of sequential visual controls in selected process was examined. As a measure of visual control effectiveness First Pass Yield index was chosen. Three operations were analyzed: assembly of components, melting components and applying a protective coating.