๐ŸŽฏ Interview Shortlist โ€” Top 3 Killer Questions

QC Engineer (Production / Parts Supplier) ยท Q1 2026 ยท Click any question to expand
D
Dhines A/L Shree Kanthan
๐Ÿ“ Shah Alam๐ŸŽ‚ 24๐Ÿ‡ฒ๐Ÿ‡พ Malaysian
#1 PICK
๐Ÿ“‹ Background
CGPA
3.89 โ€” 1st Class
University
UPM (EE)
Current
Texas Instruments
Role
Process Engineer
๐ŸŽฏ Why #1
Has the full Toyota toolkit (DOE, FMEA, 8D, RCA, SPC, DMAIC) + Six Sigma certified. Currently running first-of-site qualifications at TI โ€” same skill set SQE work needs. Bonus: built AI/AVI inspection (10ยตm particle detection) โ€” Industry 4.0 ready.
โœ… STRONG HIRE โ€” SQE / Process QE track
๐Ÿ’ช Top Skills
Six Sigma โœ“ DOE โœ“ FMEA โœ“ 8D โœ“ Why-Why โœ“ RCA โœ“ SPC โœ“ DMAIC โœ“ AI/AVI โœ“ PLC โœ“ Python C++ FPGA/Verilog SolidWorks SQL Power BI
โ“ Top 3 Killer Questions
1
8D causation proof โ€” D5 verification
โ–ผ
"Walk me through your 8D for the GaN/7.5 mil thin wafer dicing qualification. What was the D5 root cause and how did you confirm it wasn't correlation but causation?"
Did he actually run 8D (not just participated)? D5 = root cause verification (the make-or-break step). Toyota suppliers must prove causation before claiming a fix works.
โœ… GREENNames the specific failure mode (e.g. chipping at UV cure edge), explains DOE to prove causation (e.g. controlled wafer lot split, single-variable test), tells what would have happened if wrong.
๐Ÿšฉ RED"We tried several things until yield came back" โ€” no systematic verification, no single-variable control.
Score โ€” /3
2
AVI vs process โ€” who is missing defects?
โ–ผ
"Your AVI detects 10ยตm particles. A supplier claims their parts pass your AVI but you still get customer complaints about field defects. How do you prove whether the AVI is missing defects vs the defects happen downstream of inspection?"
The hardest QC problem: inspector vs process distinction. Statistical thinking (false negative rate, sampling, MSA). Will he challenge his own system or blame supplier first?
โœ… GREENRuns MSA (Gauge R&R on AVI), compares defect distribution vs historical pattern, investigates process steps between AVI and customer, uses SPC to detect drift.
๐Ÿšฉ RED"We'd blame the supplier" โ€” no critical thinking about own process or measurement system.
Score โ€” /3
3
SQE diplomacy โ€” Six Sigma vs Kaizen
โ–ผ
"A senior Toyota supplier engineer tells you 'We don't need Six Sigma, our kaizen works fine.' How do you respond in your first 30 days with them?"
Toyota mindset: does he know Six Sigma + kaizen are complementary, not competing? SQE relationship skills โ€” can he influence without alienating? Will he fight or listen first?
โœ… GREENAsks "Show me your kaizen results first" โ†’ finds their actual pain โ†’ introduces DMAIC where kaizen can't reach (multi-variable, statistical). Toyota culture = respect what works, fix what doesn't.
๐Ÿšฉ REDDefends Six Sigma as "better" or dismisses kaizen. Either shows he doesn't understand Toyota culture or can't influence a senior supplier.
Score โ€” /3
A
Muhamad Nor Adlan
๐Ÿ“ Shah Alam๐ŸŽ“ UTP Mech๐Ÿ‡ฒ๐Ÿ‡พ Malaysian
#2 PICK
๐Ÿ“‹ Background
CGPA
3.39
University
UTP (Mech)
Current
Mark Jaya Eng.
Role
Project Engineer
๐ŸŽฏ Why #2
ASNT NDT Level 2 (rare for fresh grad) + Reliability engineering major (Weibull++, BlockSim) โ€” strong for supplier incoming inspection and equipment reliability audits. Weak on Toyota core tools (only Ishikawa/4M from 8-month internship) and currently in construction project role, not production QC.
โš ๏ธ BORDERLINE โ€” Incoming Inspection / NDT track
๐Ÿ’ช Top Skills
ASNT NDT Lvl 2 โœ“ OSHC โœ“ Ishikawa โœ“ 4M โœ“ Weibull++ โœ“ BlockSim โœ“ AutoCAD โœ“ Catia โœ“ Python (basic) C++ (basic) PADI Diver
โ“ Top 3 Killer Questions
1
Real Ishikawa depth โ€” branch that was WRONG
โ–ผ
"Your CV lists Ishikawa and 4M from an 8-month internship. Walk me through a real defect you investigated. What was the fishbone branch that turned out to be WRONG, and how did you catch it?"
Real depth vs interview-talk. Does he know initial Ishikawa branches are often wrong hypotheses? Toyota spirit: "Ask 5 why" โ€” does he know his first answer was probably wrong?
โœ… GREENStarted with 4M, ran Pareto, eliminated 3 branches via data, tested 4th, found root cause was actually a 4M interaction (e.g. Material X behaves differently under Machine's Y temperature drift).
๐Ÿšฉ RED"We followed the 4M and found it was Machine" โ€” too clean, no iteration, no mention of wrong branches.
Score โ€” /3
2
NDT Level 2 acceptance vs rejection judgment
โ–ผ
"ASNT NDT Level 2 cert โ€” pick ONE method (UT/MT/PT/RT) you certified in. Describe a defect you'd ACCEPT on supplier's incoming material at Level 2 criteria, and one you'd REJECT. Why?"
Real ASNT Level 2 understanding vs "passed the test only". Acceptance vs rejection threshold thinking. Cost-quality trade-off awareness.
โœ… GREENNames method (e.g. MT for surface cracks), describes real indication type (linear vs rounded, length, location), references acceptance code (ASME V / ASTM E1444), shows false call vs real defect distinction.
๐Ÿšฉ RED"Reject anything with indication" โ€” textbook, not real Level 2 judgment, no acceptance code awareness.
Score โ€” /3
3
Weibull ฮฒ-parameter โ€” supplier decision
โ–ผ
"You majored in Asset Integrity & Reliability. How would Weibull++ change your supplier decision on a critical CNC machine โ€” vs just looking at MTBF? Why does shape parameter ฮฒ matter more than average life?"
Reliability depth (his stated major). Toyota supplier needs machines that don't surprise โ€” early-life failures vs wear-out. Statistical maturity: Weibull ฮฒ = 1 (random, PM doesn't help), ฮฒ > 1 (wear-out, PM helps), ฮฒ < 1 (infant mortality = supplier QC issue).
โœ… GREENExplains shape parameter ฮฒ interpretation across regimes, connects to supplier selection (ฮฒ<1 = bad process control, reject), connects to PM strategy at customer site.
๐Ÿšฉ RED"MTBF is fine, Weibull is too complex" โ€” dismisses his own major, no statistical maturity, would miss infant mortality defects from bad suppliers.
Score โ€” /3
๐Ÿ“˜ 0/9 โ€” Dhines
๐Ÿ“™ 0/9 โ€” Adlan
๐Ÿ† DECISION