Quality control in manufacturing an agricultural thresher machine involves inspection of all components/parts throughout the production process, ensuring proper dimensions, material quality, functionality, and overall durability, with key aspects including: raw material checks, dimensional inspections, functional testing, performance testing under simulated field conditions, and statistical process control (SPC) to maintain consistent quality standards throughout production. Checking the quality of raw materials like steel, bearings, belts, and other components for compliance with specifications regarding strength, hardness, and composition..

Running the assembled thresher machine under controlled conditions to test key functions like feeding mechanism, threshing action, grain separation, and straw ejection.