Sense and sensibility: on the diagnostic value of control chart rules for detection of shifts in time series data.

ABSTRACT:

Background

The aim of this study was to quantify and compare the diagnostic value of The Western Electric (WE) statistical process control (SPC) chart rules and the Anhoej rules for detection of non-random variation in time series data in order to make recommendations for their application in practice.

Methods

SPC charts are point-and-line graphs showing a measure over time and employing statistical tests for identification of non-random variation. In this study we used simulated time series data with and without non-random variation introduced as shifts in process centre over time. The primary outcome was likelihood ratios of combined tests. Likelihood ratios are useful measures of a test's ability to discriminate between the true presence or absence of a specific condition

SUBMITTER: Anhoj J 

PROVIDER: S-EPMC6171235 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature