The research of the application of quality function deployment in the design and development of all-plastic folding chair

This study applied quality function deployment to establish user demand for plastic folding chairs, using the five expectations for plastic folding chairs through quality function deployment, examined "aesthetics," "convenience," "structural safety," "comfort," and "environmental protection." These five demands are placed into the House of Quality and transformed into design elements and benchmarked. The results show that the first three projects and weights for customer requirements are sorted in the order of "parts unlikely to fall off" (6.8%), "non-pinching during use" (6.7%), and "ergonomic considerations" (6.5%). Among the parameter characteristics of design, the first three projects and weights are sorted in order of "use sliders or pullers to prevent pinching" (10%), "no screws used" (9.4%), and "holistic design of structure and form" (8.5%). The result is used as reference data for the design and development of plastic folding chairs. The first all-plastic folding chair without screws has been designed. Through user satisfaction tests the product has achieved 99.3% satisfaction from users. Eight of 15 demand qualities achieved a 100% satisfaction rate. This proved that the analysis and result of this research may be a specific reference in plastic folding chair design for relevant designers and developers.