what does this chart say? can you explain it brieflt?

Suggested Improvements Control Matrix Control Goals of Operations Process Ensure Ensure security of effectiveness of operations Ensure efficient employment of resources For vendor invoice inputs ensure resources Recommended control plans A B IV IC IA Controls X X X A2 Agreement of open purchase orders and receiving reports X A3 Agreement of run-to-run totals (reconcile input-output batch totals) A6 Reconcile bank account X X S1 Independent validation of vendor invoices X X S2 Match invoice, purchase order, and receiving report X X X X S3 Agreement of run-to-run totals (reconcile input-output batch totals) S4 Digital signatures IV = Input validity IC = Input completeness IC = update completeness UA Update accuracy A - Optimize cash discounts B - Ensure the amount of cash is maintained in demand deposit accounts is sufficient to satisfy cash disbursements Control goals of the information process X X For payment inputs ensure IV IC IA X X X X X X X X X Suggested Improvements Control Matrix Control Goals of Operations Process Ensure Ensure security of effectiveness of operations Ensure efficient employment of resources For vendor invoice inputs ensure resources Recommended control plans A B IV IC IA Controls X X X A2 Agreement of open purchase orders and receiving reports X A3 Agreement of run-to-run totals (reconcile input-output batch totals) A6 Reconcile bank account X X S1 Independent validation of vendor invoices X X S2 Match invoice, purchase order, and receiving report X X X X S3 Agreement of run-to-run totals (reconcile input-output batch totals) S4 Digital signatures IV = Input validity IC = Input completeness IC = update completeness UA Update accuracy A - Optimize cash discounts B - Ensure the amount of cash is maintained in demand deposit accounts is sufficient to satisfy cash disbursements Control goals of the information process X X For payment inputs ensure IV IC IA X X X X X X X X X