In the Purchasing department at a company, a purchase request can be assigned a facilitator in the Purchasing department. This promoter complies with the purchase request through the entire purchasing process and acts as the sole contact person or entity within the company that purchases goods or services. Purchasing refers to your fellow employees who purchase goods and services as customers. The purchasing process so that requests to buy from certain special customers must be made to bid to suppliers and the relevant Bidding Request for these requests is accepted by Purchasing pros. If the purchase is not from a particular customer, the product or service can simply be purchased from any approved supplier, but the purchase request must still be approved by Purchasing , and this department must issue a Purchase Order. For “special customer” purchases, Purchases can issue Orders after the winning bid has been accepted. List related entities and attributes and plot the ER for this business process. List any assumptions you have to make to determine identifiers, qualifiers, etc.