A method for detecting a fault condition of a manufacturing process involving acquiring data and developing a model based on a plurality of manufacturing related variables for a plurality of outputs of a manufacturing process. The method also involves identifying which of the manufacturing related variables have a substantial affect on the model for detecting faulty outputs of the manufacturing process. The method also involves updating the model by using the manufacturing related variables identified as having a substantial affect on the model to improve the ability of the model to detect faulty outputs of the manufacturing process.