What is Material Efficiency?
Every blueprint in EVE Online has two research parameters: Material Efficiency (ME) and Time Efficiency (TE). ME reduces material consumption during production, TE shortens production time. Both scale from 0 to 10.
ME savings go straight into your production costs. A blueprint at ME 0 uses the full base material cost, at ME 10 you save 10% — sounds small, but it adds up fast on expensive builds like capital components.
required = max(runs, ceil(base_qty × runs × (1 − ME/100)))
The max(runs, ...) ensures at least 1 unit of material per run — even with high ME research.
Break-even: When is more research worth it?
Research time doesn't scale linearly. ME 9 to ME 10 often takes longer than ME 0 to ME 5. Whether the effort pays off depends on material cost.
| ME Level | Material Savings | Research Time (approx.) | Worth it from |
|---|---|---|---|
| ME 0 → 1 | 1% | ~5 minutes | Almost always |
| ME 1 → 5 | ~1% each | up to 2 hours | Expensive materials |
| ME 5 → 10 | ~1% each | up to 24 hours | Only expensive BPs |
| ME 10 | Maximum | — | Standard for T1 |
Structure bonuses matter
Engineered structures like Raitaru or Azbel grant extra ME bonuses of 1-2.5%. On expensive builds, that's millions of ISK per job. A Sotiyo even grants up to 2.6% on capital production.
In practice: An ME 10 blueprint in a Raitaru gives an effective ME value of ~11-12 — these bonuses are often overlooked.
Time Efficiency: When is TE10 useful?
TE10 reduces production time by 20%. For long jobs (capitals, T2 components) this dramatically improves slot throughput. With 5 Manufacturing slots and jobs taking 4h instead of 5h thanks to TE10, you produce 25% more per day.
For short jobs (under 30 minutes) TE matters less — job switching costs more time than you save.
Conclusion
For T1 production: ME 10 is mandatory, TE 10 pays off on long jobs. For T2 material costs are high enough that every extra percent of ME is worth it. On capitals, a well-researched blueprint can make the difference between profit and loss.
The Build Plan Manager in EVE Industry Tool handles this calculation automatically — including structure bonuses and ME suggestions based on current material prices.