Trial Balance and Engagement software solutions represent the first two building blocks in a successful client engagement.The trial balance is at the core of double-entry bookkeeping, providing an assessment of whether the general ledger is in balance by making a tally of the debits and credits. Engagement workpaper and process software has come more recently, combining workflow processing, document management, reporting, collaboration and other underpinnings of the engagement process into a more streamlined package. The two are often used in tandem, and are sometimes even provided in the same software.