Various logistics methods can be adopted to ensure the smooth and efficient running of a business. Some popular methods include just-in-time (JIT) inventory management, lean manufacturing, and the theory of constraints (TOC). JIT inventory management is a system whereby inventory is only ordered and delivered as and when it is needed, to avoid the build-up of unnecessary stock. This can help to reduce costs and increase efficiency. Lean manufacturing is a methodology that focuses on the elimination of waste in all areas of production, to increase efficiency and quality. The theory of constraints is a management philosophy that states that every system is limited by one or more constraints. The aim is to identify and then remove these constraints to improve the performance of the system.