Additional flow and stock equations
| Eq | Variable | Formula | Parameters/Conditions |
|---|---|---|---|
| 16 | Total active fleet | Fleet stage 1 new + Fleet stage 2 mid + Fleet stage 3 old | – |
| 17 | Stage duration | Replacement cycle time / 3 | – |
| 18 | Revenue generation | Total active fleet × Annual benefits per container / 12 × Route multiplier | Route multiplier = 1.32 (Asia-Europe); otherwise = 1.0 |
| 19 | Operating cost flow | Total active fleet × Operating cost per container / 12 | – |
| 20 | Operating cost per container | (Base op costDry × %Dry/100 + Base op costReefer × (100 − %Dry)/100) × Technology cost factor | Base Op costDry = $240; Base op costReefer = $600 |
| 21 | Replacement expenditure | Replacement cycling × Replacement cost unit | Replacement cost unit = Initial cost per container × 0.5 |
| 22 | Ageing flow (stage 1 → 2) | Fleet stage 1 new / Stage duration | – |
| 23 | Ageing flow (stage 2 → 3) | Fleet stage 2 mid / Stage duration | – |
| 24 | Replacement cycling | Fleet stage 3 old / Stage duration | – |
| 25 | Net cash flow | Revenue generation − Operating cost flow − Replacement expenditure − Investment inflow | – |
| 26 | Investment inflow | Calculated new adoption rate × Initial cost per container | – |
| 27 | Discounted cash inflow | Net cash flow × Discount factor | – |
| 28 | Profit accumulation | Revenue generation − Operating cost flow − Replacement expenditure − Total depreciation expense | – |
| 29 | Total depreciation expense | Platform depreciation flow + Equipment depreciation flow | – |
| 30 | Platform depreciation flow | Platform development fee / Platform useful life | Condition: if Accumulated platform depreciation < Platform development fee; otherwise = 0; Platform useful life = 72 months |
| 31 | Equipment depreciation flow | (Total investment − Platform development fee) / Replacement cycle time | – |
| 32 | Financing costs | Total investment × 0.06 / 12 | – |
| 33 | NPV (net present value) | Cumulative discounted cash flow | – |
| 34 | Payback achieved | 1 if Cumulative cash flow ≥0; otherwise = 0 | – |
| 35 | Discounted payback achieved | 1 if Cumulative discounted cash flow ≥0; otherwise = 0 | – |
| Eq | Variable | Formula | Parameters/Conditions |
|---|---|---|---|
| 16 | Fleet stage 1 new + Fleet stage 2 mid + Fleet stage 3 old | – | |
| 17 | Replacement cycle time / 3 | – | |
| 18 | Total active fleet × Annual benefits per container / 12 × Route multiplier | Route multiplier = 1.32 (Asia-Europe); otherwise = 1.0 | |
| 19 | Total active fleet × Operating cost per container / 12 | – | |
| 20 | (Base op costDry × %Dry/100 + Base op costReefer × (100 − %Dry)/100) × Technology cost factor | Base Op costDry = $240; Base op costReefer = $600 | |
| 21 | Replacement cycling × Replacement cost unit | Replacement cost unit = Initial cost per container × 0.5 | |
| 22 | Fleet stage 1 new / Stage duration | – | |
| 23 | Fleet stage 2 mid / Stage duration | – | |
| 24 | Fleet stage 3 old / Stage duration | – | |
| 25 | Revenue generation − Operating cost flow − Replacement expenditure − Investment inflow | – | |
| 26 | Calculated new adoption rate × Initial cost per container | – | |
| 27 | Net cash flow × Discount factor | – | |
| 28 | Revenue generation − Operating cost flow − Replacement expenditure − Total depreciation expense | – | |
| 29 | Platform depreciation flow + Equipment depreciation flow | – | |
| 30 | Platform development fee / Platform useful life | Condition: if Accumulated platform depreciation < Platform development fee; otherwise = 0; Platform useful life = 72 months | |
| 31 | (Total investment − Platform development fee) / Replacement cycle time | – | |
| 32 | Total investment × 0.06 / 12 | – | |
| 33 | Cumulative discounted cash flow | – | |
| 34 | 1 if Cumulative cash flow ≥0; otherwise = 0 | – | |
| 35 | 1 if Cumulative discounted cash flow ≥0; otherwise = 0 | – |
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