1. Introduction Process capability indices are measures of the capability of a process to produce according to some assigned specifications related to some characteristics of the items produced. In most of the cases it is assumed that the studied process is described through only one characteristic. However, sometimes the need arises for measuring the capability of processes described through t...

Process capability analysis (PCA) is the ability of a process that measures the degree of providing customer expectations. Generally, the expectations of customer have been defined by using specification limits. A process capability index (PCI) summarizes ability of process to conform specification limits. Generally, this comparison is made by analyzing ratio of specification limits and six-sig...

Process Capability indices have become popular for describing how well a process meets specified tolerances. The lack of affinity with the process nonconformance probability p and the difficulty of dealing with the sampling distribution of their natural estimators affect greatly the use of the traditional indices as Cp, Cpk, Cpm and Cpkm. In this paper, a capability index is proposed which is c...

abstract small and medium-sized enterprises (smes) play a major role in national economy. e-business processes provide many opportunities for these companies to compete in regional and international markets. this study seeks to analyze the factors affecting e-business implementation in small and medium-sized enterprises. for this purpose, 10 factors and 61 indices were identified based on the l...

A manufacturing process cannot be released to production until it has been proven to be stable. Also, we cannot begin to talk about process capability until we have demonstrated stability in our process. This means that the process variation is the result of random causes only and all assignable or special causes have been removed. In complicated manufacturing processes, such as drilling proces...

In today’s competitive business and industrial environment, it is becoming more crucial than ever to assess precisely process losses due to noncompliance to customer specifications. To assess these losses, industry is extensively using Process Capability Indices for performance evaluation of their processes. Determination of the performance capability of a stable process using the standard proc...

An inductive approach for learning fuzzy relational rules is described. Fuzzy relational rules are rules in which fuzzy relations in the antecedent parts of the rules are allowed. These rules allow us to use an extended model of rule with a greather capability to represent knowledge in a similar human way, but with an additional complexity in the search process.

A function-based evaluation approach is proposed for a systematic study of fuzzy proportional-integral-derivative (PID)-like controllers. This approach is applied for deriving process-independent design guidelines from addressing two issues: simplicity and nonlinearity. To examine the simplicity of fuzzy PID controllers, we conclude that direct-action controllers exhibit simpler design properti...

Interpretability is one of the most significant properties of Fuzzy Systems which are widely acknowledged as gray boxes against other Soft Computing techniques such as Neural Networks usually regarded as black boxes. It is essential for applications with high human interaction (decision support systems in medicine, economics, etc). The use of accuracy indices to guide the fuzzy modeling process...