From data-flow diagram for equipment procurement, specifying equipment required is the first process which specify the material needed, the quantity needed, and the date it is needed. Then bring the equipment specification to validate and find supplier from database. After that, bring them to get cost estimates and choose supplier from a list. Then make order details and bring them to place equipment order. They will be checked and signed. Then send a purchase order to vendor.
When supplier accepts delivery of equipment, they will deliver equipment include delivery note to buyer. Buyer will check purchase order and goods receipt document and compare them to the invoice. If data in all three documents match, a payment is sent to vendor. Next step is installation equipment and accept delivered equipment. At last, equipment details will be stored in equipment database.