ISIS is an automated batch-processing business application designed to validate and process all site-level activity plus the daily Settlement System Code (SSC) transactions and Tariff Billing Code (TBC) transactions for both Electricity & Natural Gas.  

The functionality of the process-application is designed to consistently provide a high level of accuracy & confidence that all transaction (FRN, SRO, ENC, ENF, DEC, DEM, SMC, UCI, DIMs, DCMs, SPI, WCI, WSI, WSD, RSA, PFAM, etc.), that may affect the status of an account, (the consumption and/or the final billed amounts); are pre & post cross-checked plus balanced against the Power Pool, TA & WO invoices for each settlement run (I, M, R & F).