Article ID: | iaor19951309 |
Country: | United Kingdom |
Volume: | 22 |
Issue: | 4 |
Start Page Number: | 443 |
End Page Number: | 453 |
Publication Date: | Apr 1995 |
Journal: | Computers and Operations Research |
Authors: | Charnes John M. |
Keywords: | simulation: applications, statistics: multivariate, time series & forecasting methods |
Runs tests for special causes are used routinely with Shewhart quality-control charts that are based on independent and identically distributed univariate processes. Recently, researchers have proposed the use of alternative, time-series-based statistical models for constructing control charts that are valid for autocorrelated processes. Monte Carlo simulation is used here to examine the effects of incorrectly assuming serial independence and using the runs tests for special causes on data generated by autocorrelated multivariate processes. The results have implications for developing and using statistical process-control techniques in practice.