Student critical thinking can be developed through a learning process, application of problem-based learning. This study to describe the critical thinking skills of third management's students in research operational course. Students asked to intervene in a great variety of problem situations often characterized by high degrees of complexity and diversity Problem based learning able to develop critical thinking skills. This model able to teach students to use many concepts, principles, and skills to solve operational research problems. Data collection by researcher interacting directly with the research subject. The analysis used Facione (2006) describes critical thinking as a way for a person to regulate himself in judging something to produce interpretation, analysis, evaluation, inference, and presentation using evidence, concepts, methodologies, criteria, or contextual considerations that are used as the basis for doing decision-making. The results show that through learning based on operational research able to develop students' critical thinking skills, especially in terms of identifying, analyzing, solving problems, thinking logically, and drawing conclusions that are appropriate to the problem. This suggests that use problems that involve critical thinking of students in the learning process. The capacity of the HOTS is closely related to thinking processes while solving mathematics problems.