workers comp experience modification factor · ncci formula · auditable · runs locally
ELR (expected loss rate) · D-ratio · per-class values come from your state's NCCI rate pages or your carrier's experience rating worksheet.
no claims · mod will be heavy credit
W and B come from your state's NCCI Table of Weighting and Ballast Values · they vary by expected losses and rating period · enter what your carrier's worksheet shows.