หากพิจารณาขนบธรรมเนียมดังกล่าวในเชิ

If considered customary in such cause and effect They found a home in the past, the popular front door door sill to indicate the territory as part of a home with the outside of the House. In addition, Virtual Earth Dam to protect the door dust. Dangerous animals in water or any other dirt enters the House as well.

Considering the tradition of the Balanced Scorecard. He found a home in the days before it hits a threshold door. To indicate the part of the territory, home to the threshold of the home also has a virtual dam. To prevent water, dust and dangerous animals. Or other impurities Going into the home.

Considering such a tradition in cause and effect. Are found in popular home do threshold for the front door. To indicate the territory as part of the home and outside the home. In addition, the threshold is also the virtual dam.Water, dirt or other dangerous animals to enter the house.