Purchasing is a crucial function in a manufacturing organization as it impacts cost, working capital, import substitution, project completion, and materials management. It involves the procurement of materials, supplies, and services needed for production and maintenance. The purchasing department is responsible for sourcing the right materials, in the right quantities, at the right price, from the right suppliers. It plays a key role in cost savings, efficient use of working capital, import substitution, project completion, and overall materials management.