Seiri and Seiton typically applied to WIP. Toyota production system is specifically emphasized the importance of stock reduction. Improvement activities will run smoothly if everyone in the entire plant to feel the extravagance, interference or problems. These problems include excessive WIP stock, stock units and the defects that were obstructed by the interference machinery manufacturing processed next.

Lean manufacturing will run as expected if the 5S management principles, especially the concept Seiton Seiri and applied to WIP management. In order for each operator to know the problems, standardized goods with plate placement instructions. Examples glance will enable anyone to easily know whether a certain item boxes are the proper place or not, or whether the boxes above the maximum.