CNC machines always require less time to make a part than manual machines.

• A. True
• B. False
• C. Sometimes
• D. Not sure

Answer: (B)

Time to produce a part depends on the overall balance between setup and run time. CNC machines are great for repeatable, complex parts because once a program is written and the fixtures are set, the machine can produce many parts with consistent, efficient metal removing, often reducing labor and variability. But they don’t always save total time. The initial programming, tool changes, and fixture setup for a CNC job can add substantial overhead, especially for a single part or a simple geometry. In those cases, manually setting up and machining the part can be quicker because you skip the programming and debugging steps. For high-volume production, CNC often wins on time and consistency, but the statement that CNC always requires less time is not correct.