Abstract
Traditional control chart procedures process the information in the time sequence plot of successive values of the control variable. In this paper we consider a control chart procedure that uses the sequential ranks of the observations. The sequential rank of an observation is defined as its rank among the most recent g observations. A control chart technique that considers exponentially weighted moving averages (EWMA) of sequential ranks is proposed. This new nonparametric technique is outlier-resistant, and it performs well if one is concerned about slowly trending process levels.
| Original language | English |
|---|---|
| Pages (from-to) | 423-443 |
| Number of pages | 21 |
| Journal | Communications in Statistics. Simulation and Computation |
| Volume | 21 |
| Issue number | 2 |
| Publication status | Published - 1992 |