CCC-r chart extended approach of CCC charts, is a technique applied when nonconforming items are rarely observed. However, it is usually assumed that the inspection process is perfect in the implementation control charts imperfect inspections may have a significant impact on the performance of the control chart and setting the control limits. This paper first investigates the ...

In some statistical process monitoring applications, quality of a process or product is described by more than one ordinal factors called ordinal multivariate process. To show the relationship between these factors, an ordinal contingency table is used and modeled with ordinal log-linear model. In this paper, a new control charts based on ordinal-normal statistic is developed to monitor the ord...

The most commonly used statistical process control charts to detect special causes are Shewhart and Cusum charts. However, the Cuscore chart is a contemporary alternative that is especially well suited for detecting special causes that can be modeled in advance based on their characteristic effect on the system. In this paper, we develop the appropriate Cuscore statistic and the required contro...

Micro-manufacturing processes are characterized by high process variability and an increased significance of measurement uncertainty in relation to tight tolerance specifications. Therefore, an approach that separates the superposition of measurement and manufacturing variation is demanded. A novel design for a quality control chart that makes it possible to monitor, control and extract measure...

The aim of this paper is to improve the quality level by finding out the root causes of the quality related problems. Quality control tools are important tools used widely at manufacturing field to monitor the overall operation and continuous process improvement. Check Sheet, Pareto Diagram, Histogram, Cause-and-effect diagram, Control Chart, Run-Chart and Scatter-Diagram are used in enhancing ...

The most concerning issues in the healthcare system will always be quality control and improvement as they are significant to health condition of patient. A statistical tool such process (SPC) charts efficient highly effective reducing sources variation within monitoring or controlling process. chart is a methodology designed evaluate change manufacturing industry being implemented gradually se...

This paper deals with the proposal of structure of an expert system for SPC which enables to user to select right control chart identify more quickly root cause of assignable variation and to accept suitable effective action in time.