The study aims to investigate the application of the vocational taxonomy domain in practice classes, PdP, and the assessment of vocational subjects. To achieve the goals of this study, the researcher has developed four objectives: (a) Determine the level of understanding technical and vocational instructors have regarding the domain of vocational taxonomy; (b) Identify the specific domain of vocational taxonomy that is utilized by technical and vocational tutors in the instruction and learning of vocational subjects; (c) Identify the domain of vocational taxonomies that is applied to practical vocational practices in the technical and vocational professors' classrooms; and (d) Determine the domain specific to vocational taxonomy. This study examines respondents' perspectives using a case study design. For the data quotation, 59 respondents in total participated. In terms of interpreting the min score, respondents strongly agreed with (a) (min=4.71; s.p=0.511), (b) (min=4.67; p=0.462), and (c) (min=4.7; s.p=0.487). Thematic analytics identify several important developing themes based on the thematic analysis, such as the use of the vocational taxonomy domain in practical classes, assessments, and teaching and learning. The findings of this study can assist and enable TVET lecturers in designing instruction, as well as educational policymakers in implementing vocational taxonomy into state education policy. In order to enhance the usability of vocational taxonomy, it is suggested that technology be integrated more extensively and practice classes be expanded.