introduction surgical site infection is a common side effect of surgeries that causes an increase in morbidity, mortality , patient length of stay in the hospital and hospital expenses. quality management as an organizational strategy helps improve working processes and enhance hospital productivity. method this study aimed to examine the impact of applying a quality management technique on red...

Improving the product reliability is the main concern in both manufacturing and service processes which is obtained by monitoring the reliability-related quality characteristics. Nowadays, products or services are the result of processes with dependent stages referred to as multistage processes. In these processes, the quality characteristic in each stage is affected by the quality characterist...

in quality control charts, the problem of determining the optimum process mean arises when the deviation of a quality characteristic in one direction is more harmful than in the opposite direction. the failure mode in these two directions is usually different. a great majority of researches in this area have considered asymmet-ric cost function for processes with single quality characteristics....