TS 12621

TS 12621 is a vocational standard that defines and classifies the Computerized Numerical Control (CNC) Machine Tools Operator occupation and frames the core knowledge and skills expected from people performing this work. In general technical terms, CNC operator work combines machine setup, program execution, monitoring, and basic quality control on machine tools driven by numerical instructions.

What this occupational standard is concerned with

The standard addresses the occupation at different levels and includes the tools and equipment used in the job. In practical manufacturing terms, a CNC operator is commonly associated with reading the job order, selecting suitable tools and fixturing, preparing the machine, starting the program, and watching the process for accuracy and stability. These activities are related but distinct from CNC programming, which is often handled as a separate technical function depending on the workplace.

It also sets out the knowledge and skill profile that each level should have. In broad technical context, that profile usually involves reading technical drawings and work instructions, handling measurement and inspection tasks, changing tools, maintaining safe working practice, and supporting consistent part quality. This document should be understood as a professional qualification framework for CNC operators, not as a machine design specification or a full training syllabus.

• Definition and classification of the CNC machine tools operator occupation
• Framework for tools, supplies, and equipment used in the role
• Knowledge and skill expectations across different occupational levels
• A basis for qualification assessment in CNC operator work