Phase-I monitoring of standard deviations in multistage linear profiles
نویسندگان
چکیده
منابع مشابه
Phase-I monitoring of general linear profiles in multistage processes
In this paper, the general linear profile-monitoring problem in multistage processes is addressed. An approach based on the U statistic is first proposed to remove the effect of the cascade property in multistage processes. Then, the 2 T chart and an LRT-based scheme on the adjusted parameters are constructed for Phase-I monitoring of the parameters of general linear profiles in each stage. Usi...
متن کاملPhase II monitoring of auto-correlated linear profiles using linear mixed model
In many circumstances, the quality of a process or product is best characterized by a given mathematical function between a response variable and one or more explanatory variables that is typically referred to as profile. There are some investigations to monitor auto-correlated linear and nonlinear profiles in recent years. In the present paper, we use the linear mixed models to account autocor...
متن کاملPhase II monitoring of multivariate simple linear profiles with estimated parameters
In some applications of statistical process monitoring, a quality characteristic can be characterized by linear regression relationships between several response variables and one explanatory variable, which is referred to as a “multivariate simple linear profile.” It is usually assumed that the process parameters are known in Phase II. However, in most applications, this assumption is viola...
متن کاملInvestigating Effect of Autocorrelation on Monitoring Multivariate Linear Profiles
Abstract Profile monitoring in statistical quality control has attracted attention of many researchers recently. A profile is a function between response variables and one or more independent variables. There have been only a limited number of researches on monitoring multivariate profiles. Indeed, monitoring correlated multivariate profiles is a new subject in the fileld of statistical proces...
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ژورنال
عنوان ژورنال: Journal of Industrial Engineering International
سال: 2017
ISSN: 1735-5702,2251-712X
DOI: 10.1007/s40092-017-0213-y