Summary

Across all seven failure points identified by Demo Precision Co. for the CNC Setup Machinist role, the candidate demonstrated each named competency without exception. The session record shows consistent alignment with keyed answers on technical decisions, sequencing, and shop-conduct scenarios.

The candidate demonstrated the ability to set up a job from the work order. The setup sequence — workholding, datum, tools, offsets, program — matched an acceptable ordering, with datum establishment placed before offset setting. Workholding selections for both operations matched the keyed answers, as did the operation order, feed selection, and G-code identification.

The candidate demonstrated first-piece prove-out practice before releasing to production. First-piece inspection was selected as the next action, and that choice preceded the exit from the prove-out stage of the session, consistent with the keyed sequence.

The candidate demonstrated the ability to read the print and interpret GD&T correctly. Datum B was correctly identified as the bore, the true position value of 0.018 was selected, and the candidate identified the critical-to-quality set — bore dimension, position feature control frame, bolt pattern dimension, and finish note — matching the keyed selection.

The candidate demonstrated the ability to hold tolerance and apply offset corrections. The correct instrument was selected for the bore check, and the disposition chosen was to adjust rather than accept or scrap. The offset entered on T03 WEAR DIA was −0.0013 in, with direction correct and magnitude within ±0.0003 of the session-keyed correction. The keyed toolpath answer was also matched.

The candidate demonstrated the ability to catch tool wear and drift during production. Wear compensation was applied at check 5, which falls within the keyed drift window of checks 5 through 7. The compensation direction was minus, correctly countering the rising bore drift, and the magnitude of 0.0004 in matched the observed drift error at check 5 within ±0.0003.

The candidate demonstrated the disposition to hold quality over output rate. When a defect part was identified at check 3, the candidate held it for disposition rather than releasing it, and this decision was made under visible time pressure.

The candidate demonstrated the conduct responses identified by Demo Precision Co. at intake. On a supervisor-override scenario, the response was to comply and document, which fell within the acceptable set. On a QA conflict, the candidate chose to remeasure rather than defer or override. Responses on the hot-job, night-shift handoff, and short-stock scenarios each matched the keyed answers.