This document discusses leveling production in a just-in-time (JIT) system. Leveling aims to satisfy customer demand by providing what customers want, when they want it, in the desired quantities. It has three components: volume, variety, and time. Leveling production involves grouping products into families and setting batch sizes as small as possible to balance the production schedule daily or weekly. The benefits of leveling include stable production, flexibility to respond to changes, and improved productivity and supply chain management.