Purchasing is responsible for procurement. Parts or materials needed to meet the agency's needs in terms of quantity, quality and time to have the lowest cost.
The Purchasing Department is responsible for purchasing raw materials. Parts or materials that the Agency needs to meet all requirements in terms of quantity, quality, time and cost with the lowest expenses.
The purchasing department has a raw material parts, or materials to the agency to match the needs of both the quantity and quality of time, with a low cost.