The synthetic control chart based on two sample variances for monitoring the covariance matrix.
Marcela Aparecida Guerreiro MachadoAntonio Fernando Branco CostaM. A. RahimPublished in: Qual. Reliab. Eng. Int. (2009)
Keyphrases
- covariance matrix
- control charts
- sample size
- covariance matrices
- statistical process control
- principal component analysis
- mahalanobis distance
- abnormal patterns
- positive definite
- real time
- gaussian mixture
- geometrical interpretation
- eigenvalues and eigenvectors
- correlation matrix
- upper bound
- objective function
- machine learning
- estimation error
- model selection
- eigendecomposition
- artificial neural networks
- pseudo inverse
- multivariate gaussian
- neural network
- class conditional densities
- symmetric matrix
- process control