A lower energy volume does not settle the efficiency argument

Three descriptions of the same year

A colleague brought me a comparison that appeared encouraging. Across the same annual facility boundary, energy use had fallen from 4.8 million to 4.2 million kWh. A 12.5% reduction seemed a straightforward improvement to present. I wanted to understand the operating account before allowing the percentage to become an investment claim. Lower consumption was a valid observation. The explanation of why it occurred, and the implications for our business, required more than the total.

IT equipment energy within that boundary had fallen from 3.0 million to 2.4 million kWh, a 20% reduction. The ratio of total facility energy to IT equipment energy therefore moved from 1.60 to 1.75. Power usage effectiveness had worsened even as the facility consumed less energy. There was no arithmetic contradiction. The denominator had changed more sharply than the numerator. Describing the total reduction alone would have omitted a relationship that the operating team and directors needed to understand.

I did not take the worse ratio as proof that facilities colleagues had performed badly. Their responsibilities include maintaining the conditions required by customers and equipment, with qualified engineering and safety decisions that finance cannot replace. Changes in demand, configuration and operating conditions may affect an energy account. The figures supplied an observation to investigate, not an explanation of cause. A financial presentation becomes less useful when it turns the need for an explanation into a verdict on the people responsible.

Nor did I interpret IT energy as a measure of the useful work customers accomplished. Our colocation company supplies premises and supported infrastructure; customers own their equipment and workloads. The energy account does not tell us the value of their computing output. It would be misleading to treat a change in the denominator as a directly comparable change in customer productivity. A board paper should retain the boundary of what the enterprise actually measures rather than borrow an attractive interpretation from another part of the customer's business.

The case for a simple headline was understandable. Directors receive many papers, and an account that begins with every measurement qualification can obscure the decision. Yet the answer was not to bury the relationship. We could state the lower total, the lower IT component and the worse ratio together, then explain the question management wanted to examine. Clarity came from organising the facts around that question, not from choosing the one percentage that made the year sound most successful.

A price illustration has a limited purpose

We also used a deliberately separate calculation to show why a quantity change and a money change need not be equal. Applying illustrative uniform prices of ₹7.20 and ₹8.10 per kWh to the two total volumes gives ₹3.456 crore and ₹3.402 crore. The calculated difference is ₹5.4 lakh. These were illustrative inputs, not the actual site tariff, paid invoice or utility account. I wanted that status stated beside the calculation, because an exact-looking number can acquire more authority than the assumptions behind it.

The illustration omitted demand charges, taxes, fuel and other real billing components. It was not used to value a capital project or report achieved savings. Its purpose was narrower: a lower volume can coexist with a much smaller reduction in a calculated energy charge when the assumed price rises. Someone examining an actual investment would need the relevant contracts, billing structure, operating evidence and timing. The illustration could help a director ask that question; it could not supply the answer.

This distinction mattered because the business had spent ₹33 lakh on measurement and financial review. It would have been tempting to put the ₹5.4 lakh modelled difference beside that expense and invent a payback conclusion. The figures do not support one. The review expenditure was actual in this fictional account, while the uniform-price comparison was illustrative and not attributed to an intervention. Combining them into a return would have made the presentation more decisive by making it less accurate.

A useful finance team should be willing to explain why an available number cannot answer a proposed question. That does not mean refusing every approximation. Early investment work often needs scenarios and provisional assumptions. The discipline is to identify their purpose, preserve their status and avoid promoting them into achieved results as they move through successive papers. A scenario can support discussion without becoming an invoice, and a measurement programme can have value without a fabricated financial recovery attached to it.

The same care applies to emissions. Energy volumes and a facility ratio alone do not establish an emissions outcome. A relevant claim would need its own appropriate boundary, evidence and calculation. I did not want our commercial narrative to move silently from lower consumption to better efficiency and then to an environmental benefit. Each step asks a different question. Directors can reasonably expect management to distinguish those questions even when specialist work is needed to answer them.

Keep investment judgement open to the operating evidence

The review changed the account we presented, rather than delivering an engineering verdict. Facilities colleagues remained responsible for explaining operating conditions and evaluating technical options. Finance examined the connection between those options, expenditure and the business case. Our contribution was to stop three different descriptions from being treated as interchangeable: the amount consumed, the ratio between two energy measures and the result of a price illustration. That separation made the next discussion more useful without pretending the analysis was finished.

I would ask a board to preserve room for the commercial argument as well. An enterprise may need to invest in resilience, customer capability or compliance even where an efficiency ratio does not improve. Conversely, an attractive ratio does not settle whether a particular investment is worth its cost. The board should understand the actual purpose and alternatives. A metric is valuable when it clarifies a decision; it becomes restrictive when management treats improving the metric as sufficient evidence that every other consequence has been considered.

Comparisons across sites require further care. Similar labels do not ensure identical measurement boundaries, operating conditions or customer requirements. A league table can therefore create a confident ordering before comparability has been established. I would first ask what the comparison is meant to reveal and whether the data support that use. If the answer remains provisional, the report should say so. Uncertainty is more manageable when it is visible than when it is hidden inside a familiar industry measure.

The lesson I retain is practical. Begin with the physical quantities and their boundaries, then explain the ratio, then identify the financial assumptions. Keep actual expenditure apart from illustrative prices and from proposed benefits. Ask qualified colleagues what the figures do and do not reveal. A board can then examine the investment on its real purpose, with disagreement still possible and unsupported conclusions removed. Lower consumption may be welcome, but the finance account should make clear exactly what has fallen, what has worsened and what remains to be explained.