Should we build it? Answered off the model
NPV, IRR, discounted payback, risk, and carbon-adjusted TCO — from the flowsheet you already solved.
NPV, IRR & discounted payback
The go/no-go numbers a stage-gate asks for — net present value at your hurdle rate, the IRR to compare against it, and the year the discounted cash flow turns positive — computed off the solved CAPEX and OPEX.
Carbon priced into the same cash flow
A carbon price turns the operational CO₂e the sustainability layer already computes into a real annual cost line, so the carbon-adjusted NPV and total cost of ownership fall out of one model — not two disconnected studies.
Monte-Carlo NPV risk
CAPEX and revenue carry screening uncertainty. Sampling them gives the NPV distribution — P10 downside, P50 median, P90 upside, and the probability the project clears zero — instead of one fragile point estimate.
Tornado sensitivity
One-at-a-time ± swings on CAPEX, cash flow and the discount rate, ranked, so you can see at a glance what the decision is most exposed to before you commit.
Live off the flowsheet
Change a reflux ratio or a feed rate and the CAPEX, OPEX, and every decision metric move with it. The appraisal is never stale, because it reads the same converged result the simulator produced.
One data model with cost & carbon
The estimator, the emissions layer, and this appraisal share one unified representation — the same stream, the same duties — so the economics and the sustainability story can never disagree.
Why this is different
A legacy cost estimator answers "what does it cost?" and stops. The investment decision then happens weeks later, in a spreadsheet, on hand-copied numbers that no longer match the current design. Because MaximaLabs's simulator, cost estimator, sustainability layer and this appraisal share one unified data model, "should we build it?" is answered on the live flowsheet — with carbon in the same cash flow and the risk quantified.
Honest by design
- ✓Screening DCF: a factored CAPEX (±30%) discounted at one flat hurdle rate over level annual cash flows — no ramp-up, no tax or depreciation schedule, no inflation. An order-of-magnitude decision aid, not an AACE Class-3 sanctioning economic model.
- ✓Monte-Carlo bands are lognormal screening assumptions (CAPEX ±30%, revenue ±15%, OPEX ±10%), and the sweep is seeded so the same inputs always give the same distribution.
- ✓The carbon price is applied to the operational Scope 1+2 CO₂e from the model — it is a reference cost you set, not a market feed.
- ✓The solver produces every flow and duty; this layer only discounts them at the hurdle rate — it never invents a process number (principle: the AI points, the solver confirms).
From flowsheet to investment decision in one place
Open the Techno-economics panel on any solved simulation, set your hurdle rate, project life and carbon price, and read the NPV, IRR, discounted payback, the Monte-Carlo downside, and the tornado of what matters most.
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