We report a case of mechanical design education at the National Institute of Technology (KOSEN). This paper presents a follow-up report on design and drawing education related to manufacturing with a focus on corporate practice. The students study a manufacturing process by planning, designing, and producing useful products based on their own ideas. First, we introduce the content and schedule of this subject, noting the shift from pair work to group work and the changes in themes. Next, we describe the class flow and show examples of products. In the class flow section, we introduce methods for selecting group proposals and managing progress using work reports. Finally, we describe a questionnaire on class activities covering the 10-year period from 2016 to 2025. The survey results showed the following: 1) Most teams managed to meet the deadline, especially after introducing progress management tools. 2) No significant changes were observed in "teamwork skills," "communication skills," or "initiative," even though some classes were conducted online in 2020. 3) In the group work, a bias in the work ratio among members was observed; students assigned to coordination roles tended to report a higher proportion of the work.