In 2025 a product comparison favoured item A because its contribution was ₹1,200 per unit against ₹900 for item B. The kiln resource was constrained, and the products used different amounts of it: A required six kiln-position hours per unit, while B required three. On that resource basis, the figures were ₹200 and ₹300 per position-hour respectively. The larger contribution per unit did not automatically identify the better use of the scarce capacity. Commercial colleagues valued the familiar unit measure, while operations wanted the resource consumption visible.
We funded ₹42 lakh of costing work to incorporate the relevant kiln-position account into the comparison. I did not instruct the business to replace every A order with B. Demand, technical requirements, quality, product mix and existing customer commitments still constrained the decision. The contribution figures were commercial measures, not net profit or an account of every factory cost. The revised analysis supported a more useful discussion about allocation and quotations without claiming that a single ratio could select the entire production plan.
The change made the commercial explanation less simple. A product that looked stronger by unit needed to be examined against the resource it consumed, and a product that looked weaker could become more attractive within a particular constraint. We did not claim an achieved margin increase from funding the model or assume that every available hour could be sold at the illustrated contribution. The work required ongoing collaboration with the people responsible for demand and production, whose evidence determined where the comparison was relevant.
I learned to ask what limits the choice before deciding which denominator should lead the financial discussion. Per-unit contribution remains useful for some questions, but it cannot answer every capacity question when units require different resources. The case is not a universal product-ranking rule or a technical claim about kiln operation. It is an example of finance making the constraint visible and preserving the other conditions that management must weigh. The value lies in a better decision account; the resulting operating and financial outcomes still require their own evidence.