Work-In-Process (WIP) on the production process must be managed as efficiently as possible. Emphasized the importance of lean manufacturing systems reduce material stock / WIP on the existing production.
Lean manufacturing aims to reduce wastage to a minimum and if possible eliminated altogether. 5S Lean manufacturing also trying to make a sustainable improvement although it was very small changes must still be done.
Likewise with the goods classified activities. This classification is the basis of 5S activities that have a large impact on productivity and quality.
Productivity is the reduced time required for the process of finding items that will be used for work. Later time remaining can be used for production activities. Clearly ascertained in terms of quality there is no material mixed with each other. The mix of materials will make the final product did not meet quality standards that have been determined. This often occurs in materials that are small.