In the past few years, there has been an increasing interest in developing project control systems. The primary purpose of such systems is to indicate whether the actual performance is consistent with the baseline and to produce a signal in the case of non-compliance. Recently, researchers have shown an increased interest in monitoring project’s performance indicators, by plotting them on the S...

In this work, an integrated model of economic production quantity, economic design of an -control chart, and preventive maintenance are investigated under non-uniform quality control parameters. The effect on the expected total cost and quality control cost is investigated with three different assumptions of the quality control parameters. Using a tabu seach algorithm, the optimal values of qua...

The current popularity of Six Sigma has highlighted the importance of variation reduction in production and service delivery process. In fact, the capability of a company in meeting customers’ quality requirements is primarily determined by the existing variation in their processes. Reducing process variation should be among the top priority for companies pursuing continuous improvement or Six ...

Locating the assignable causes by use of the abnormal patterns of control chart is a widely used technology for manufacturing quality control. If there are uncertainties about the occurrence degree of abnormal patterns, the diagnosis process is impossible to be carried out. Considering four common abnormal control chart patterns, this paper proposed a characteristic numbers based recognition me...

This article investigates integrated maintenance, production, and product quality control policy for a supply chain consisting of single machine producing only one type product, main storage warehouse, multi-purchases warehouses. The variation the production rate its use over time impact manufacturing system’s degradation degree. Hence, is subject to random failure that directly affects product...

We propose a Shewhart control chart based on gauging theoretically continuous observations into multiple groups. This chart is designed to monitor the process mean and standard deviation for deviations from stability. By assuming an underlying normal distribution, we derive the optimal grouping criteria that maximizes the expected statistical information available in a sample. Control charts ba...

The notion of variation and determining and eliminating it has become a subject that has found a wide application area after total quality approach has become widespread. There is a variety of control charts used in determining variation. Since the 1920’s, when W.Shewhart developed the first control chart, control charts, which have been examined many times in every aspect, are accepted to be o...

The clean water is one of the basic needs with unlimited use even in economic field. opportunities provided can be utilized by companies that produce bottled drinking (AMDK). existence defective products obtained production so need for quality analysis product still within control limits on P chart. This done knowing highest value influential failure mode. So suggestions improvement kaizen give...