Leveraging Integrated Quality Function Deployment (QFD) and Theory of Solving Problems Inventively, Eco-Efficiency (TRIZEE) Methodologies for Sustainable Innovation in Chair Design through Wood Waste to Enhance Eco-Efficiency

The wooden furniture industry generates up to 48% of the waste, revealing an imbalance between raw material consumption and sustainable resource availability. Addressing this challenge requires alternative approaches such as repurposing wood waste into marketable products. This study explored waste utilization in the wood furniture sector, leading to the development of an alternative chair design made from reclaimed wood. This study employs quality function deployment (QFD) and the theory of solving problems inventively, eco-efficiency (TRIZEE) methodologies. To determine design preferences, the QFD method incorporates the results of a customer survey conducted across 138 restaurants in Semarang City, Indonesia. The collected design requirements were processed using TRIZEE Design Tools, resulting in chair designs that prioritized eco-efficiency. In this study, we successfully developed a dual-function chair that can be stored or converted into a waiting chair. Designed to be safe, comfortable, aesthetically appealing, and environmentally friendly, the chair optimizes material usage and reduces waste. By integrating sustainable design principles, this innovation contributes to forest conservation and promotes ecoconscious practices in furniture manufacturing.