This document discusses line balancing and capacity planning. It defines line balancing as balancing the workload across assembly line stations to optimize output, reduce costs, and identify bottlenecks. Three types of assembly line models are described: single-model, mixed-model, and multi-model. Capacity planning is defined as determining short and long-term needs by estimating requirements for machines, labor, resources and analyzing processes. It helps make strategic, tactical and operational decisions about system availability and sizing capacity.