Self-directed project
Predictive Maintenance: Industrial ML for Fault Detection
Condition-Monitoring Engineer · AI / ML · August 2026
A ProoV case study · educational project, not employment
Built a compact rolling-bearing fault detector end to end: engineered time-domain features, trained a shallow decision tree on training bearings only, and evaluated it on a held-out set with catch-rate and false-alarm rate. The candidate also wrote a maintenance memo that justified an alarm threshold using explicit cost trade-offs and translated the result into plain language for non-experts.
Graded against
- Feature engineering (signal to honest numbers)25%
- Held-out evaluation (honest measurement)25%
- Cost-based threshold decision + memo25%
- Compact model + embedded-budget justification15%
- Plain-language explanation10%
Passed · pass mark 60/100
What stood out6
- Trained a depth-capped decision tree on training bearings only and stated a compact 3-node, depth-1 model against the embedded budget.
- Reported held-out catch-rate and false-alarm rate rather than relying on training performance.
- Made a threshold choice using explicit cost figures and tied the memo to maintenance operations.
- Leakage-Aware Model Training
- Held-Out Evaluation
- Cost-Based Operational Decision-Making
The work I submitted18 tasks
10 tasks · 6.4k characters · Python · 8 written answers · 438 words
- Initial Prediction50 characters
- Load Plot Signal CodePython · 1.8k characters
- Load Plot Signal205 characters
- Example Rms WorkedPython · 697 characters
- Time Features143 characters
- Freq FeaturesPython · 1.1k characters
- Train Classifier363 characters
- Evaluation Heldout288 characters
- Threshold Decision334 characters
- Decision Memo1.4k characters
- Initial Prediction6 words
- Load Plot Signal Code163 words
- Load Plot Signal15 words
- Example Rms Worked72 words
- Time Features10 words
- Freq Features117 words
- Train Classifier31 words
- Evaluation Heldout24 words
Summarised on purpose — the submitted code and writing stay private so this page cannot be reused as an answer key. The full submission sits behind the verified certificate.