To adapt, to guide and to interact —three models of human-product relationship

The goal of the human engineering design is clear, and the approach to catch the goal is various. The author will take three chair designs as cases: the chair designed by basic human scale standard, kneeling chair, and armchair ¿vertebra¿. The three cases exactly exhibit three models of human-product relationship: adapt, guide and interact. The human engineering design should not use only one model invariably and isolated, but choice, organize and colligate various means and forms widely and neatly in order to realize design goal. So we should understand and accord with human´s attribute and particularity firstly, and then lead human´s life developing to energetic and positive way. We also should harmonize the relationship of human and product, and mobilize their advantages and effects. The product and its user will affect each other, match each other, supply each other and revise each other, and then establish the best relationship of human-product.