polynomial regression for payroll examination

I serve as internal auditor in few clients ,one of my client has thousands of employees in different location, most of them in the head office, the client looks for corporate control for the salary monitoring

is it make sense to use the regression method in order to find outliers, potential parameter can be -years of experience, gender, level/rank etc I planned to go over all the monthly payroll and look for significant outliers ,because of the differences between the global location, it might be a good idea to focus only in the head office the idea is to train the model for previous months average and test it for the current month what do you think is too much effort or theoretical ? or can have a good chance to bring value ?
thank you

https://stackoverflow.com/questions/67363358/polynomial-regression-for-payroll-examination May 03, 2021 at 12:08PM