Integrating Quality Function Deployment and 3D CAD for Composter Machine Design

Agustia Dwi Putra; Ansarullah Lawi; Razan Muhammad Railis

doi:10.63643/jges.v4i1.396

Penulis

Agustia Dwi Putra Institut Teknologi Batam
Ansarullah Lawi Institut Teknologi Batam
Razan Muhammad Railis Institut Teknologi Batam

DOI:

https://doi.org/10.63643/jges.v4i1.396

Kata Kunci:

Quality Function Deployment, CAD 3D, mesin komposter, sampah organik, desain produk

Abstrak

Organic waste management in urban residential areas remains a serious challenge, including at the temporary waste collection site (TPS) of The Vitka City Complex, Batam, where about 7.3 tons of organic waste per week is largely unprocessed, causing odor, maggot infestation, leachate accumulation, and potential soil and water pollution. This study aims to identify user requirements for a composter machine using the Quality Function Deployment (QFD) method and to develop a 3D Computer-Aided Design (CAD) based design that improves organic waste processing at the site. A descriptive quantitative approach was applied through field observation, structured interviews, and a five-point Likert questionnaire administered to 16 site managers and officers. All 15 user-need items (Voice of Customer) were valid, with item-total correlations of 0.70 to 0.88, and reliable, with a Cronbach's alpha of 0.89. QFD analysis produced seven technical characteristics, with large capacity and strong construction obtaining the highest relative weight (25%), followed by an optimal shredding system (19%) and a simple control system (19%). The design was developed in SolidWorks 2021 as a 1,000 kg capacity machine with steel shredding blades, a simple control panel, an aeration system, and an emergency stop. Static simulation using AISI 4340 steel showed that the dominant working stress remained below the material yield strength, indicating a structurally safe design. Integrating QFD and 3D CAD thus produces a composter design that matches actual user needs and can serve as a model for sustainable organic waste management in other residential areas.

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