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The process quality index (PQI) system and quality-oriented statistical tolerancing have been discussed based on three PQIs, which provides a standardized interface between process quality requirements and control chart design. An integrated statistical approach to specification, production, process monitoring and inspection can be realized via using quality-oriented statistical tolerancing. By adding...
Selective assembly is an effective way to achieve precision assembly with economical manufacturing processes based on mass production for mating parts with high precision requirements. The tolerance zone divisions of grouping for mating parts are usually fixed, and the tolerances of hole and shaft are designed to be equal in current selective assembly. But, remanufacturing of mating parts is usually...
A technique scheme for improving quality control and quality assurance in assembly process of mine's-lamps has been established to adapt the requirement that each miner's-lamp's inspection items should be traceable, which is an on-line inspection system that can automatically mark and identify the marks, obtain data, save, distinguish, judge and alarm, and have the statistical analysis function based...
A real-time monitoring system for monitoring the production of infusion solutions in a pharmaceutical plant is introduced. The main features of the system are its ability to stratify the measuring data into numerous dimensions, focus on visual presentation of the quality related information, such as the input volume of distilled water and their temperature. The realinfo configuration software based...
A systematic quality control approach for monitoring the production of infusion solutions in a pharmaceutical plant is introduced. The main features of approach are combining modern quality control technologies with quality information system. Based on the strict quality requirements and the process flow of the production of infusion solutions, a serial suitable statistical quality control methods...
On the basis of studies to process quality indices and fit quality indices, the quality-oriented statistical tolerancing is introduced, which provides an interface between fit quality and the process parameter design of mating parts. A statistical mating model via the quality-oriented statistical tolerancing under information-based manufacturing condition is discussed. Compared with traditional mating...
Aimed at improving the manufacturing processes of mating parts with relatively lower cost, a new statistical tolerance (ST) model for improving fit quality is presented. On the basis of studies on process quality indices and fit quality indices, the quality-oriented statistical tolerancing is introduced, which provides an interface between fit quality expectation and the process parameter design of...
Current SPC charts are process monitoring tools for keeping process in stable status, and cannot assure a desired process quality without additional requirements. To develop a quality-oriented SPC approach, a standardized interface between process quality indices and the parameter design of control charts, i.e., quality-oriented statistical tolerance (QOST), is needed. QOST can be determined based...
The statistical tolerancing models and design approach for assuring a preset process quality target are presented. A set of standardized process quality indices (PQIs) is introduced for meeting the measurement and evaluation to process yield, process centering and quality loss. Quality-oriented statistical tolerancing technique is introduced to concurrent design for assuring process target. The comprehensive...
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