K-nearest neighbor-based method and system to provide multi-variate analysis on tool process data

A server computer system creates a reference fingerprint for a first tool running a recipe. The server computer system uses reference data that pertains to the first tool performing within parameters to create the reference fingerprint. The reference fingerprint includes a target baseline and allowable ranges based on the target baseline. The server computer system determines whether sample data that is associated with a second tool running the recipe is performing within the parameters based on a comparison of the sample data to the reference fingerprint. The second tool can be the first tool or another tool of a same type as the first tool. The server computer system provides a classification of the second tool to at least one of a system or a user based on the comparison of the sample data to the reference fingerprint. The classification indicates whether the second tool is performing within the parameters.