... FuzzySystem for Statistical Process Control 18.1 Statistical Process Control 18.2 Neural Network Control Charts 18.3 A Hybrid Neural Fuzzy Control Chart 18.4 Design, Operations, and Guidelines ... alternative statistical process control method for monitoring process mean and variance. A hybrid neural fuzzy system consists of four modules for data input, data processing,decision making, and data ... decision making, and data summary. The data input module takes observa-tions from QC x and transforms them into appropriate types for both control charts for mean M-NN and for variance V-NN,...