Please let us know if you have feedbackScott Engstrom is chief commercial officer at GridX, where he works with utilities on rate design, modeling and complex billing implementation. This is the pace at which utility billing needs to work because the rates, programs, and business models that will deliver affordability and demand flexibility can’t wait two to three years for the billing system to catch up. Most utility billing systems were designed in the analog-meter era, when a bill was one price multiplied by one usage total. Postmortems are remarkably consistent: complex rate scenarios account for many post-go-live billing defects, regardless of which CIS the utility relies on. Complex rate calculation is a different challenge with a different operating tempo.