This document outlines the process flow for purchasing, receiving, selling, and inventory management for a company. It shows the key departments involved - purchasing, warehouse, and selling - and the documents and approvals needed at each step, such as purchase requisitions, orders, receiving reports, invoices, and inventory updates. The overall process ensures inventory levels are monitored and items are purchased, received, stocked, sold to customers, and payments are processed accordingly between departments and vendors/customers.