A data integrity module and method for evaluating data in a process information
database. A neural network generates statistical patterns for specifying patterns
for the data being evaluated. A fuzzy expert rules base specifies rules for evaluating
the data. A processor, responsive to the rules base and the statistical patterns,
identifies suspect data in the process information database by evaluating the data
according to the rules base and the statistical patterns. A modification system
modifies the suspect data in the process information database.