The objectives of this research were (1) to design and construct a semi-automatic sago pearl sieving machine capable of providing consistent and efficient size separation, (2) to test the performance of the semi-automatic sieving machine in comparison with manual sieving, and (3) to evaluate user satisfaction toward the developed machine. The semi-automatic sago pearl sieving machine was designed to use a motor-driven vibrating screen to continuously classify sago pearls by size. The performance