Efficiency (CBA):
1. Low B/C ratio: costs outweigh the benefits and B/C ratio lower than 1, score 0
2. Costs equal to benefits: costs equal to benefits and B/C ratio equals to 1, score 0
3. High B/C: benefits outweigh the costs and B/C ratio higher than 1, score up to 1 reflecting the ratio of B/C
For efficiency criterion input indicators are identified as part of the overall Logical Framework of indicators.