QUALITY CONTROL CHARTS are a widely used tool, developed in the field of statistical process monitoring (SPM) to identify when a system is deviating from typical behavior. High-dimensional, timedependent data frequently arise in applications ranging from health care, industry, and IT to the economy. These data features challenge many canonical SPM methods, which lose precision as the dimensiona...

The cumulative conformance count (CCC) charts are widespread in process monitoring of high-yield manufacturing. Recently, it is found the use of variable sampling interval (VSI) scheme could further enhance the efficiency of the standard CCC charts. The average time to signal (ATS) a shift in defect rate has become traditional measure of efficiency of a chart with the VSI scheme. Determining th...

In this paper, an independent component analysis (ICA)-based disturbance separation scheme is proposed for statistical process monitoring. ICA is a novel statistical signal processing technique and has been widely applied in medical signal processing, audio signal processing, feature extraction and face recognition. However, there are still few applications of using ICA in process monitoring. I...

In many industrial and non-industrial applications the quality of a process or product is characterized by a relationship between a response variable and one or more explanatory variables. This relationship is referred to as profile. In the past decade, profile monitoring has been extensively studied under the normal response variable, but it has paid a little attention to the profile with the ...

In this talk, we discuss several control charts for monitoring multivariate processes. These control charts are based on the concept of data depth. We begin with reviewing control charts introduced in Liu (1995). We further construct several new depth based multivariate control charts. Unlike the commonly used multivariate control charts, the charts discussed in this talk are all distribution f...

Diagnostic laboratories are increasingly required to meet stringent quality standards, and validated assays are needed to achieve formal accreditation. Validation of test methods is often considered to be finalised when the assay parameters and characteristics have been established. However, like any process, diagnostic assays are subject to random variation resulting in shifts in the mean test...

the reference charts for mid upper arm (muac), chest (chc) and head (hc) circumferences of a cohort of 317 healthy infants (153 boys and 164 girls) born in shiraz (southern iran) and monitored from birth for 2 years are presented. centiles for muac and hc lie below the netherlands and us subjects respectively. however, there is no suggestion of ill health for iranian subjects. the use of locall...