One-piece flow is defined as moving /making only what is needed, when it is needed, thus minnimizing WIP inventory Minimizing WIP inventory enhances efficiency , enables quick response time, eliminates build-up of defects and facilitates standardized work.
one of the most important tenets of the TPS is never to vary the wprk pace. Therefore,as efficiencies are introduced in the factory or design shop,or as the rate of the production falls, it is vital to remove unneeded workers from the system so that the same intensity of work is maintained .Otherwise the challenge of continual improvement will be lost