Illustrative D-Matrix for an electronics company – evaluating techniques for top causal losses
| Causal loss description (COPQ) | Origin location | Proposed improvement technique | E | F | S | QPI | Shortlisted for E-Matrix? |
|---|---|---|---|---|---|---|---|
| Inadequate Soldering Training (€35,500) | QMS/HR (training dept.) | Technique B1: IPC-A-610 Soldering Certification Training | 5 | 4 | 4 | 4.4 | Yes |
| Technique B2: Automated Optical Inspection (AOI) for Solder Joints | 4 | 3 | 4 | 3.6 | No (less direct) | ||
| Technique B3: Purchase Advanced Soldering Stations | 4 | 3 | 3 | 3.4 | No | ||
| Poor PSU Quality (€10,000) | Supplier X (incoming mat. System) | Technique A1: Enhanced Supplier Audit and Joint QI Programme | 4 | 3 | 4 | 3.6 | Yes |
| Technique A2: 100% Incoming PSU Burn-in Test | 3 | 4 | 3 | 3.4 | No (appraisal, not prevention) | ||
| Incorrect AOI Test Parameters (€6,250) | ICT (In-Process control) | Technique C1: AOI Vendor Optimisation and New Algorithms | 5 | 4 | 3 | 4.2 | Yes |
| Technique C2: Internal Retraining on AOI Programming | 4 | 4 | 3 | 3.8 | Consider as supporting | ||
| Outdated SMT Feeder Calibration (€12,500) | SMT M/C A (production) | Technique D1: Implement Predictive Maintenance for Feeders | 4 | 3 | 3 | 3.4 | Yes |
| Technique D2: Feeder Overhaul/Replacement Programme | 5 | 2 | 4 | 3.6 | No (lower QPI for higher cost) |
| Causal loss description ( | Origin location | Proposed improvement technique | E | F | S | Shortlisted for E-Matrix? | |
|---|---|---|---|---|---|---|---|
| Inadequate Soldering Training (€35,500) | QMS/HR (training dept.) | Technique B1: IPC-A-610 Soldering Certification Training | 5 | 4 | 4 | 4.4 | Yes |
| Technique B2: Automated Optical Inspection ( | 4 | 3 | 4 | 3.6 | No (less direct) | ||
| Technique B3: Purchase Advanced Soldering Stations | 4 | 3 | 3 | 3.4 | No | ||
| Poor | Supplier X (incoming mat. System) | Technique A1: Enhanced Supplier Audit and Joint | 4 | 3 | 4 | 3.6 | Yes |
| Technique A2: 100% Incoming | 3 | 4 | 3 | 3.4 | No (appraisal, not prevention) | ||
| Incorrect | Technique C1: | 5 | 4 | 3 | 4.2 | Yes | |
| Technique C2: Internal Retraining on | 4 | 4 | 3 | 3.8 | Consider as supporting | ||
| Outdated | Technique D1: Implement Predictive Maintenance for Feeders | 4 | 3 | 3 | 3.4 | Yes | |
| Technique D2: Feeder Overhaul/Replacement Programme | 5 | 2 | 4 | 3.6 | No (lower |
Scores E, F, S are on a 1–5 scale. QPI is calculated using a weighted additive model: QPI = (0.4 E) + (0.4 F) + (0.2 S). Higher QPI indicates a more preferred technique. The ‘Shortlisted’ column indicates selection for detailed economic analysis in the E-Matrix
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