Investability begins with a physical balance

A transition proposal can sound coherent while making incompatible promises. A supplier may describe lower energy consumption, a sponsor may announce lower emissions, and finance may expect lower operating expenditure. Each proposition refers to a different quantity. Consuming less electricity does not necessarily lower the relevant emissions claim if production or the accounting boundary changes. Lower attributed emissions do not necessarily lower the bill. Lower annual expenditure does not necessarily repay the capital commitment within its useful life. An investment dossier becomes assessable when it makes these relationships explicit, beginning with what changes physically and what service remains comparable.

The opening decision is therefore a charter for the appraisal. The charter identifies the intervention, the service it must deliver, the alternative against which it will be assessed and the commitment currently requested. It also separates claims that the organisation intends to make. A statement about electricity bought by a facility belongs to a different evidential chain from a statement about avoided system emissions. A statement about a screening net present value belongs to a different decision stage from an offer of committed financing. The charter prevents a favourable result in one chain from quietly standing in for missing evidence in another.

Consider a fictional industrial facility investigating demand reduction and an additional supply arrangement. The engineering question concerns how demand changes while the required production service continues. The accounting question concerns how supplied energy and emission factors should be attributed within a declared boundary. The commercial question concerns the expenditure that disappears and the expenditure that is introduced. The finance question concerns capital, timing, contingencies and obligations. These questions share information but cannot be collapsed into a single attractive adjective. Describing the proposal as efficient or green does not identify which proposition has been established.

The energy identities, discounting convention and recognised accounting-method distinctions are not presented as discoveries of this paper. The retained primary material supplies narrow guidance on boundaries, verification and appraisal, and the canonical app supplies the reproducible numerical instrument. The original contribution is a decision protocol connecting a defined service, a physical comparison, cash terms, claim scope and the authority to make the next commitment. The protocol is demonstrated rather than asserted: the fictional Aster Works case sends computed alternatives through a cash condition, a provisional climate mandate and an unresolved-surplus constraint, then records a different accountable action at each failure. The resulting dispositions cannot be recovered by sorting cost per tonne alone.

The fictional roles are introduced here so the chapter records can be read independently. Idris Ko chairs the decision and stops commitments beyond the authorised scope. Mara Sene owns service and operating interfaces, Nora Vale owns measurement, Owen Diallo owns commercial terms, Leila Chen owns cash and funding interpretation, and Safia Bello owns reporting. All names and delegations are authored teaching conditions. Existing-staff evidence preparation returns at the diligence review before the maintenance-plan freeze. Supply terms and external wording have separate precommitment gates. These event deadlines do not assert a real project calendar, and the recorded evidence gaps do not become verified facts through assignment.

A physical balance provides the first discipline because it requires the proposal to name its inputs and outputs. Electricity demand has to be met by sources that fall within the calculation's boundary. A decrease in an input must correspond to less waste, changed conversion, changed operating duty or changed service. Additional supply has to serve demand, be stored, exported or curtailed according to a stated model. None of those outcomes can be assigned by enthusiasm. A balance also exposes missing carriers. A calculation that records added electricity but omits displaced fuel cannot establish the complete climate effect of electrification.

The boundary is a decision instrument, not a claim that the wider system is irrelevant. A facility calculation can be useful precisely because its limits are manageable. It becomes misleading when the facility result is presented as the consequence for an entire power system or product chain without additional analysis. The analyst should state what crosses the perimeter and what is held outside it. The committee can then decide whether the missing mechanisms could alter the proposed commitment or the intended claim. A narrow model earns credibility through a narrow interpretation.

The charter proposed here begins with a service statement. The facility might need a specified product quality, a stable thermal condition or dependable mechanical output. The statement matters because a cheap energy outcome can be achieved by reducing useful service. Such a change may be a legitimate commercial option, but it should be appraised as a changed production choice. It should not be reported as a technical improvement on an unchanged service. A service boundary also prevents the appraisal from treating unlike energy carriers as interchangeable merely because their consumption is recorded in energy units.

The next element is a credible alternative. Continuing current operation is convenient, but it is not always the action the organisation would take without the proposed investment. Existing equipment may require replacement, regulations may change permissible operation, or a production plan may alter duty. A sponsor who assigns all future improvement to the proposal may overstate its additional contribution. A sponsor who compares it with an impossible continuation may exaggerate both cost savings and abatement. The charter records the decision that the alternative represents and the evidence needed to sustain it.

The intervention must then be decomposed into mechanisms. A motor upgrade, a control change, reduced leakage and a new supply contract can affect different terms in the balance. Their effects may overlap. If a supply arrangement already serves nearly all remaining demand, further efficiency may reduce the amount of supplied energy used rather than the grid energy originally expected. If a demand increase precedes an efficiency measure, the assumed efficiency scope may apply to the added load. A package description should therefore explain which loads each measure affects and how the sequence is interpreted.

Economics follows the same decomposition. Energy charges, demand charges, maintenance, consumables and operating labour do not respond identically to a reduction in annual electricity use. A contract can preserve a fixed payment even when physical consumption falls. A control measure can save electricity while requiring additional maintenance. A new process can change product value or downtime, effects absent from a simple energy-price comparison. The charter should distinguish the cash terms included in the screening model from those still requiring a fuller business case. A preliminary benefit estimate is useful when its perimeter is explicit.

The time basis must also be declared. Annual totals are sufficient for some initial questions and insufficient for others. A calculation can balance annual electricity demand and annual supplied energy without establishing that supply is available when the process needs it. The same calculation can assign constant yearly savings without representing commissioning, degradation or an interruption. The committee should identify which time-dependent questions are material to the proposed decision stage. A concept screen may tolerate an annual approximation; a supply contract or production conversion can require a much more resolved operating case.

The study uses the Transition lab as a disciplined but deliberately narrow numerical companion. It begins with annual electricity demand, applies supplied demand-reduction percentages and added loads sequentially, caps additional annual renewable energy used at remaining demand, and assigns supplied factors and flat energy prices. It annualises upfront capital across a supplied constant horizon and discounts constant annual cash savings. That calculation can expose arithmetic and interaction problems within its boundary. It does not model fuel displacement, useful heat, hourly dispatch, contractual emissions attributes or debt service. Those omissions govern what the examples can establish.

A completed appraisal charter should state what the screening output will be used for. It might support a request for engineering study, identify which tariff term needs confirmation or show that a package deserves comparison with a simpler alternative. It should not default to implementation approval simply because the output has the precision of a financial model. Precision records an arithmetic result conditional on inputs. The authority to commit capital requires a separate judgement about evidence, feasibility and obligations. The charter ties the calculation to that judgement instead of allowing the screen to set its own decision stage.

The charter can also preserve a justified exception. A project with unattractive energy savings might be necessary to meet a service obligation, protect product quality or enable a later conversion. A proposal with an attractive abatement cost might create an unacceptable outage. The committee can recognise such considerations without forcing them into an energy metric. The stronger record states the screening result and the independent reason for the disposition. It also states whether the climate claim remains valid when the investment proceeds for another purpose. A legitimate investment rationale does not repair an inaccurate emissions statement.

Challenge should be directed at the mechanism most likely to change the decision. If the demand response is unsupported, improve measurement or engineering scope. If the result depends on a disputed factor basis, separate the relevant accounting perspectives. If the financial benefit depends on a contractual payment disappearing, inspect the contract rather than refine the discount rate. If sequencing changes the actual final demand, develop the operating envelope. Analytical effort is scarce. Its value lies in resolving a consequential uncertainty, rather than adding detail to assumptions that already have little influence on the disposition.

The charter remains useful after approval because it records the conditions under which the recommendation was made. A change in production, connection terms, operating scope or reporting requirements can invalidate a particular proposition without invalidating every aspect of the investment. Keeping the chains distinct helps the organisation respond proportionately. It may need to revise the claim, renegotiate the contract, repair performance or reopen the capital decision. The purpose of the physical-first architecture is to make these responses traceable, from the service and energy balance to the financial commitment and the public statement.