MRP-II answers questions about what items are needed for manufacturing, how many items are needed, and when they are needed. It provides information on semi-finished products, components, raw materials, quantities to manufacture and purchase, and dates for manufacturing and purchasing. Capacity requirement planning is the second element of resource requirement planning. It helps planners make scheduling decisions before problems occur and verifies sufficient capacity exists to meet production needs from MRP plans. Controllable factors that impact capacity include labor, facilities, machines, shifts, overtime, and subcontracting.