Illustrative cost index. Arbitrary teaching inputs, not industry benchmarks or measured process data.
Base case: 100.0 index points.
Base cost = 100 units; feedstock = 25 of those units. Feedstock scenario = 100 + (25 × 0.20) = 105. Output scenario assumes unchanged total cost and 10% less saleable output: 100 ÷ 0.90 = 111.1.
| Scenario | Cost index |
|---|---|
| Base case | 100.0 |
| Feedstock +20% | 105.0 |
| Output -10% | 111.1 |