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The proposal of the system of regular monitoring of the suppliers’ process capability indices
Kubica, Ondřej ; Zbudil, Ondřej (referee) ; Škapa, Stanislav (advisor)
This diploma thesis named “The Proposal of the System of Regular Monitoring of the Suppliers’ Process Capability Indices” is divided into two sections. There is a theory about statistical process control with emphasized process capability analysis in the first section. The content of the second section is starting point, procedure and the outcome of the project I worked on in Robert Bosch Company, České Budějovice. The aim of the project is the improvement of input quality via the evaluation of suppliers based on their outcomes of SPC.
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Problems in Solder Paste Stencil Printing for Fine Pitch Components
Šimeček, Ondřej ; Polsterová, Helena (referee) ; Starý, Jiří (advisor)
Despote the indisputable advantages of fine-pitch components, is need to calculate with a few trouble during production, especially increased requirements for accuracy of mounting and solder printing. In this work I’m concerned with problems of solder printing for these components and evaluation using SPC. For the evaluation I used 3D paste inspection based on laser scanning of the surface. The output of this work is to describe the principles of solder printing and elaborating of GR&R, SPC analysis and histograms of solder printing for some outputs. I focused in my master thesis on motive design change of problematic components and economic evaluation of the adjustments.
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The Six Sigma methodology
Zajícová, Hana ; Jarošová, Eva (advisor) ; Malá, Ivana (referee)
Bachelor thesis deals with the desription of the statistical foundations and individual steps of Six Sigma, which are descibed by the DMAIC model. The thesis focuses on statistical process control and control charts. The main goal is to evaluate the possible use of control charts for attributes, namely the control chart for fraction nonconforming or p-diagram and to describe its properties expressed by the operating characteristic (OC). The influence of the sample size on the OC curve is examined. The last part of this theses deals with the desription of the xi-diagram as an alternative of the p-diagram. The properties of this alternative and classical p-diagram are compared.
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