On the impact of sensor maintenance policies on stochastic-based accuracy

The concept of stochastic-based accuracy and its calculation procedure for the case of corrective maintenance in data reconciliation-based systems were recently presented [Bagajewicz, M. (2005b). On a new definition of a stochastic-based accuracy concept of data reconciliation-based estimators. In: Proceedings of the 15th European symposium on computer- aided process engineering; Bagajewicz, M., & Nguyen, D. (2008). Stochastic-based accuracy of data reconciliation estimators for linear systems. Computers and Chemical Engineering, 32(6), 1257–1269]. This paper discusses the effect of preventive maintenance policies in chemical plants on stochastic-based accuracy. We show and evaluate a few practical solutions to the problem. The extent to which an effective maintenance policy helps to improve accuracy is shown and the economic justification is provided. Two examples are provided.