Warehousing provides time and place utility for raw materials, goods, and finished products, allowing firms to use customer service as a competitive tool. Basic warehousing decisions include ownership, centralized vs decentralized structure, location, size, layout, and what products are stored where. Public warehouses store goods for the general public on payment of rent. Basic warehouse operations involve receiving, put-away, order picking, and shipping. Proper warehouse design considers demand forecast, order quantities, space requirements, aisle space, transportation interface, order picking space, and storage space.