Low delivery time: the fasteners required for production belong to the project system, due to the uncertainty of the project, the length of time will lead to untimely delivery, thus affecting production
2. High stocking capital: fasteners are used in large quantities, and a stocking is used for about 2~3 months, and the large stocking of fasteners also occupies a large amount of warehouse area, which affects the stocking of other materials
3. Stagnant inventory: due to project needs, production plan changes, resulting in more stagnant materials, stagnant material control, processing will also take up labor costs
4. High management cost: Fasteners are received after a series of processes such as mentioning the plan, purchase order, incoming quality inspection, shelf, outgoing distribution to the work station, and employee sign-off, which seriously affects the use of fasteners.