The purchase plan is prepared to determine what and when to purchase.

Prepare contracts, record project requirements for products and services, and find potential suppliers. Solicit bids to obtain appropriate information, quotations, bids, offers or proposals. Supplier selection, review all offers, select suppliers and negotiate the final contract with them. Contract management, management of contracts and sales relations; Review and record the supplier's performance, and establish necessary corrective actions, which will be used as a reference for selecting suppliers in the future