APPLICATION OF QUALITY FUNCTION DEPLOYMENT IN THE SAFETY WOODEN PUZZLE DESIGN FOR KIDS

Abstract

The purpose of this research is to (1) study customer preferences for wooden jigsaw puzzless using house of quality and (2) propose safety guidelines for designing wooden jigsaw puzzless using quality transformation techniques. The study involved 30 parents of children aged 3 months to 12 years. Data was collected through a 5-part questionnaire covering material, design, usefulness, maintenance, and other aspects. Quality Function Deployment (QFD) and House of Quality (HOQ) techniques were used to plan the design and development of wooden jigsaw puzzless. The research revealed six safety aspects ranked by technical importance, including appropriate size (14.54%), durability and lightweight (12.39%), cleanliness and absence of foreign substances (12.22%), sturdy packaging (12.17%), standard paint color (7.79%), and smooth surface (6.52%). The design guidelines summarized that wooden jigsaw puzzless should be larger than 3.2 cm and longer than 6 cm for children over 3 years old, made of strong and lightweight wood, and packaged in sturdy boxes. The paint should be durable, free from toxic substances, and the surface should be smooth.