Which practice best supports reducing operator-to-operator variation?

Which practice best supports reducing operator-to-operator variation?

• A. 5S
• B. TPM
• C. Standardized work
• D. Kanban

Answer: (C)

Reducing operator-to-operator variation comes from having everyone perform the task the same way every time. Standardized work does exactly that by documenting the exact method to perform the task, including the sequence of steps, the time allotted for each step, and the tools and workstation setup. When the standard is followed, differences in how different operators approach the job are minimized, leading to more consistent quality and output. It also makes training new workers easier and provides a clear baseline for future improvements. Other practices address different goals. 5S helps keep the workspace organized to reduce waste and confusion, but it doesn’t specify the exact method an operator should follow. TPM focuses on equipment reliability and maintenance, not on aligning human methods. Kanban manages flow and inventory to pull work through the system, not the way each operator performs the task.

Reducing operator-to-operator variation comes from having everyone perform the task the same way every time. Standardized work does exactly that by documenting the exact method to perform the task, including the sequence of steps, the time allotted for each step, and the tools and workstation setup. When the standard is followed, differences in how different operators approach the job are minimized, leading to more consistent quality and output. It also makes training new workers easier and provides a clear baseline for future improvements.

Other practices address different goals. 5S helps keep the workspace organized to reduce waste and confusion, but it doesn’t specify the exact method an operator should follow. TPM focuses on equipment reliability and maintenance, not on aligning human methods. Kanban manages flow and inventory to pull work through the system, not the way each operator performs the task.