Decrease waste = increased flow/smooth and uninterrupted move of materials
Lead time is from when the order is taken to when it's delivered
Traditional batching is doing parts in batches and waiting until one batch is done to start the next.
One-Piece Flow is doing one piece, passing it on, starting the next piece once person 2 has it.
Optimize operations using value stream mapping (flow chart) and Plan, Do, Check, Act (PDCA). Value stream mapping is a visual representation of the shop flow, how things should be going and where they should be going