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Implementing SPC in the Production Process
Dostál, Petr ; Macháček, Martin (referee) ; Bartes, František (advisor)
The thesis deals with implementing of statistical process control (SPC) on CNC cut center into the mechanic production. One part of the project is engaged in theoretical information gathering, process monitoring and data collection. Second part deals with stabilization, regulation and improvement of the process using right statistical instruments. As a result is implementing measuring station from where will be the process data transferred to a server and evaluated. On the basis of that is possible to implement a correction in the right time if the process isn´t stabilized. The main objectives of the thesiss are cost reduction, scrap reduction and modernization of the process.
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Statistical Process Control with SW Support
Michálek, Jiří ; Král, J.
The contribution deals with the analysis of situation in a manufacturing process by application of SPC methods.The approach is described by use of methodological schemes together with attention to problems that can occur by noncorrect usage of statistical tools. The contribution contains also an illustrative example of data analysis by application of a suitable software.
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Regulační diagramy s rozšířenými mezemi a způsobilost procesů
Michálek, Jiří
The assumptions about behaviour of observed quality variables demanded by classical Shewhart diagrams are not often satisfied as practice shows. These assumptions concern Gaussian density function whose parameters, i.e. mean value and dispersion must be constant in time. As this demand need not be satisfied in practice therefore processes with changing mean value or dispersion have begun to analyse. This fact is changing the statistical control and capability of such manufacture processes.
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