Candidate Assessment Report- Employer:
- Demo Precision Co.
- Role:
- CNC Setup Machinist
- Candidate:
- Marcus DeLeon
- Date:
- 2026-06-13
| Reading the print | Demonstrated |
| Planning the setup | Demonstrated |
| Proving out the first piece | Demonstrated |
| Production run | Demonstrated |
Across the requirements Demo Precision Co. named for the CNC Setup Machinist role, the candidate demonstrated each one. The responses show sound print and GD&T reading, disciplined setup sequencing, careful first-piece prove-out, and correct root-cause diagnosis on production drift, with judgment oriented toward protecting the part and the schedule.
Skill-area findingswhat was observed in each area
Reading the print and GD&T
- Identified datum B correctly and explained the datum reference frame.
- Worked the MMC position bonus correctly, arriving at 0.018 on the Ø.293 hole.
Setup and sequencing
- Sequenced operations to hold the bore-to-A perpendicularity and the pattern's position.
- Established datum A before machining the controlled features.
Prove-out discipline
- Did not trust the air run; single-blocked the first cut at a reduced feed.
- Verified size and watched load and chip before committing to the run.
Production drift and root cause
- Read the oversize-plus-torn-finish pattern as tool wear or built-up edge.
- Corrected with a wear offset and confirmed a part before continuing, rather than masking the cause.
Organizational & culture fitqualitative — not scored right/wrong
Assessed qualitatively, for your team to weigh against your own needs.
- Framed decisions around protecting the part and the schedule, not raw speed.
- Treated the offset change as something to confirm and flag, consistent with a quality-first shop.
Stage breakdowncorrect & time by stage
| Stage | Correct | Time |
|---|---|---|
| Reading the print | 2/2 | 3m 0s |
| Planning the setup | 1/1 | 5m 0s |
| Proving out the first piece | 1/1 | 4m 0s |
| Production run | 1/1 | 6m 0s |
Question-by-question detailevery answer vs. the correct one
Reading the print
1. On this print, which feature is datum B?
Their answer: The Ø7.400 bore.
2. The 8× Ø.290 holes carry true position Ø.015 at MMC. A hole measures Ø.293. How much position tolerance does that hole actually get?
Their answer: 0.018. The 0.003 over MMC adds a bonus to the 0.015.
Planning the setup
1. Plan the setup so the bore-to-A perpendicularity and the bolt pattern's position to B hold. What order, and why?
Their answer: Indicate datum A, finish-bore B in the same setup so perpendicularity holds, then drill the pattern locating from B.
Proving out the first piece
1. The program air-cut clean above the part. On the first cut into metal, what do you do and watch for?
Their answer: Single block at a reduced feed override, hand on feed hold; watch the load meter, listen for chatter, check the first chip and verify size before continuing.
Production run
1. Twenty parts in, a bored diameter has crept .0008 oversize and the finish has gone torn. Find the cause, bring it back, and say what you would avoid.
Their answer: Oversize plus a torn finish points to a worn insert or built-up edge. Measure the trend, change the insert, correct size with a wear offset, and confirm one part before running on. I would not just keep bumping offsets without finding the cause.
Rule-based and reviewed by HireSciences before release. Each skill area is rated Demonstrated (80%+ of its questions correct), Partial (50–79%), or Not demonstrated (below 50%); the overall band follows from those ratings. Organizational & culture fit is assessed separately and is not part of this band. Findings map only to the requirements the employer named at intake.