Explain in simplest way

Developing Standards Standard Procedures Establishing control over purchasing ensure a continuing supply of _ sufficient quantities of the necessary foods, with each of quality appropriate to its intended use and purchase at the most favorable price. Standard must be develop for: 1. The quality of food purchased 2. The quantity of food purchased 3. The price at which food is purchased - Establishing Quality Standards 'It is important first to determine which perishable non-perishable food is required in order to produce products of consistent quality. 'Thus it is important to draw up the list of all food items to be purchased, including those specific and distinctive characteristic that best describe the desired quality of each in written description also known as standard purchase specifications. 'It is usually base on federal grading or common market grading