Recent Advances in Process Monitoring: Nonparametric and Variable-Selection Methods for Phase I and Phase II

ABSTRACT

The main aim of this article is to review and discuss two particular topics of statistical process monitoring: the need for a nonparametric approach to Phase I analysis and the use of variable selection–based control charts in multivariate Phase II monitoring. After discussing a number of critical issues related to these topics, I present recently proposed solutions and summarize several research problems that require further investigation.

KEYWORDS:

• control charts
• distribution-free
• high-dimensional data
• multistage processes
• profile monitoring
• shewhart
• statistical process control
• variable selection.