A Gaussian Process Control Chart for Monitoring Autocorrelated Process Data

Autocorrelated data arises in a variety of processes. To statistically monitor such processes, special tools are needed to account for these Correlations. In this paper, we propose a new monitoring technique based on the use of Gaussian process models. The proposed monitoring method is a powerful yet simple to use technique because it only requires a basic knowledge of statistics and optimization. Simulation results show that the performance of the proposed method is similar to that of the individuals control chart applied to independent process data. The proposed method is illustrated with real process data taken from the literature.