When there are no lead-times, the possibility to make planning which do not rely on forecasts becomes bigger and bigger. A lot size of one makes it possible to adapt when demand is changing. This is because when demand is increasing again a new batch will be produced. Given the fact that the JIT philosophy has a wide range of goals, it s not strange that with JIT we get a view on the total manufacturing picture. The possibility for products to flow through manufacturing on family based basis.
Quality control includes every stage of manufacturing including the purchase of raw material.
Supplier quality engineering is used to evaluate supplier capability, help suppliers develop process control, resolve quality issues with suppliers, and certify that suppliers qualify for JIT production. Receiving inspection provides an inspection service for purchasing. On time delivery, frequency of delivery, and receiving and stocking the material are three major aspects of purchasing quality. On-time material delivery means that the workstations receive the material just before it is required. Costs associated with material shipping include packaging and handling costs.