Design and analysis of ergonomic and green floor chair

Ahmad Sidi, Afuan Syamer (2024) Design and analysis of ergonomic and green floor chair. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

This project is part of the Fundamental Research Grant (FRGS) FRGS/1/2023/TK02/UTEM/02/2, which requires floor chairs that are ergonomic, green, and suitable for the open co-working space at the Faculty of Industrial and Manufacturing Technology and Engineering. Existing products reveal a significant lack of ergonomic floor chair made from green materials, resulting in environmental concerns among eco-conscious consumers. Therefore, the contribution of the study is to propose a conceptual design of ergonomic floor chair that is made of green materials. The floor chair design requires fulfilling several design requirements needed such as ergonomics, foldability, green material and space efficiency. Five conceptual designs are proposed and evaluated using the TOPSIS method with the design features of ergonomics, foldability, sustainable material, space efficiency, and conventional manufacturing process. Two-tier of customer surveys were conducted to get the customer requirements and to evaluate the conceptual design, with 77 total number of respondents. Design 3 was identified as the optimal solution due to the higher weightage in sustainability, foldability and ergonomic factors, compared to the other designs. The study integrated green concepts by selecting materials using Granta EduPack software, concluding that softwood (specifically pine along the grain) and flexible polymer foam were the best choices for the chair structure and padding, respectively. Ergonomic analysis using RULA and CATIA software confirmed that the final design met acceptable ergonomic standards for the 95th and 50th percentiles of male anthropometric data and the 5th percentile of female data, with a final RULA score of 2. The project aligns with Sustainable Development Goal (SDG) 3, which highlights its contribution to ensuring healthy lives and promoting well-being by providing ergonomic seating solutions.

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