نتایج جستجو برای: fuzzy process capability indices
تعداد نتایج: 1533720 فیلتر نتایج به سال:
It has been proved that process capability indices provide very efficient measures of the capability of processes from many different perspectives. These indices have been widely used in the manufacturing industry for measuring process reproduction capability according to manufacturing specifications. In the past few years, univariate capability indices have been introduced and used to characte...
This thesis presents contributions within the field of process capability analysis. Process capability analysis deals with how to assess the capability of processes. Based on process capability analysis one can determine how the process performs relative to its product requirements or specifications. An important part within process capability analysis is the use of process capability indices. ...
Process capability indices PCIs aim to quantify the capability of a process of quality characteristic X tomeet some specifications that are related to ameasurable characteristic of its produced items. One such quality characteristic is life time of items. The specifications are determined through the lower specification limit L , the upper specification limit U , and the target value T . Maiti ...
Due to widely practical application of quality techniques, many decisions in processes and equipment evaluation, control, and improvement are made every day in manufacturing, research, and development. Besides, the philosophy of measurement system analysis (MSA) depends on measurement error which hides true process capability. So it must be implemented prior to any process improvement activitie...
A primary assumption of many procedures in statistical process control and in process capability analysis is that the observations taken from the process are independent . However many processes exhibit a certain degree of autocorrelation. In this paper we discuss the effects that autocorrelation may have on process variance and capability indices and we show that when autocorrelation exists, ...
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