Assessment is the final acquisition of student work to measure competence. Therefore we need an assessment model that can describe the results of achieving student competence. In this study, the aim is to design an assessment model that will be used in the learning process in welding practices. The product development procedure uses the steps proposed by Borg & Gall. Research samples are experts in the field of welding and welding subject teachers. Data obtained from interviews and observations then analyzed using qualitative descriptive analysis techniques. The results of this study generally produce an assessment model on welding practices for vocational students consisting of 5 levels, namely: (1) welding parameters, (2) machine settings and work safety, (3) make a welding line, (4) grooves, and (5) the standard of the American Welding Society. The valuation model is completed with a rating scheme, level of assessment, aspects of assessment, assessment indicators, appraisal description, assessment score, and evaluation.