In order to increase the overall quality and effectiveness of the welding process, it is necessary to methodically and effectively identify the ideal combination of welding factors utilising the Multi-objective Optimisation Based on Ratio Analysis technique. A multi-criteria decision-making process called MOORA assesses several welding parameters and the conditions that go along with them in order to improve welding quality, boost output, and cut down on defects. The possibility of Multi-objective Optimisation Based on Ratio Analysis to contribute to developments in the fields of welding and fabrication is what makes this study topic so important. In order to increase the overall effectiveness, efficacy, and quality of the welding process, researchers and engineers can use MOORA to systematically evaluate and optimise welding factors. An evaluation and ranking of options based on numerous criteria or objectives are done using the Multi-Objective Optimisation Based on Ratio Analysis approach of decision-making. It offers a methodical way to assess several possibilities and choose the best course of action. In Multi-Objective Optimisation Based on Ratio Analysis method, the decision problem is typically characterized by several criteria or objectives that need to be considered simultaneously. These criteria could be quantitative or qualitative & can represent various aspects of the problem, such as cost, quality, efficiency, and performance. Alternate Parameters taken as Wielding process parameters 1 to 7. Evaluation Parameters taken as Bandwidth, Reinforcement, Penetration, Width of HAZ. From the rank table in result we can get that wielding process parameters 4 has the first rank whereas wielding process parameters 1 has the last rank (seventh rank). the first ranking wielding process parameters 4 is obtained with the lowest quality of wielding process parameters 1