APPLICATION OF U-CHART AND C-CHART IN TECHNOLOGICAL PROCESS OF PRIMARY WOOD PROCESSING

• Main Authors: Damjan Stanojević, Slobodan Stefanović, Imre KISS
• Format: Article
• Language: English
• Published: KD Mapro 2014-01-01
• Series: Journal of Process Management. New Technologies
• Subjects: application; tehnological; processing; control chart
• Online Access: http://www.japmnt.com/images/Volume%202/Issue%201/APPLICATION%20OF%20U-CHART%20AND%20C-CHART%20IN%20TECHNOLOGICAL%20PROCESS%20OF%20PRIMARY%20WOOD%20PROCESSING.pdf

Control charts are statistical methods of quality control. Basically it is a graph where the abscissa represents the order of control, and the ordinate is marked with parameter values, which are controled by samples over a certain size. Using charts determine varying quality and also related the stability and capacity of the production process in relation to the established control limits. Dr. Schuchardt, which can be regarded as the creator of control charts, says that their mission: to maintain the production process in a state of control, to lead the production process into a state of control, to show that the state of control has been achieved. According to Dr. Schuchardt „for a phenomenon is said to be controlled if based on current data we can predict, at least within certain limits, how the phenomenon will change in the future. Here, under certain prediction within limits means that we can determine, at least approximately, the probability that the phenomenon is found within the given limits“. Control charts for attribute quality characteristics are: p- control chart, m- control chart, u- control chart, c- control chart.