In business environments where discrepancies in prices charged and quantities re-ceived are commonplace, the validation process is difficult to automate. Programmed decisionrulesmustbeimplementedtoacceptless-than-perfect matchesbetweensupport-ingdocuments.Forexample,thesystem may bedesignedtoaccept invoiceprices thatare within five percent of expected prices. Discrepancies in the items and quantities ordered and received, however, are more difficult to resolve. Dealing with these problems often requires reordering inventory and/or making adjustments to accounts payable records. In this type of business setting, many organizations employ manual procedures for reconciling supporting documents and validating theliability.