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The multi-tier contribution margin framework
Decompose revenues through progressive tiers of variable and dedicated fixed costs before enterprise overhead.
| Tier | Calculation formula | Operational scope | Strategic decision enabled |
|---|---|---|---|
| Gross Sales | Units $\times$ List Price | Full list price contract value | Pricing discipline and list integrity |
| Net Sales | Gross Sales $-$ Discounts $-$ Allowances | Realized cash inflow from customer | Commercial realization and discount leakage audit |
| CM I (Unit Margin) | Net Sales $-$ Direct Variable Materials/Hosting/Labor | True marginal variable cost per delivery | Minimum acceptable floor price for spot orders |
| CM II (Product Margin) | CM I $-$ Dedicated Product Line Fixed Costs | Tooling, dedicated licenses, product management | Product portfolio rationalization and SKU elimination |
| CM III (Customer Margin) | CM II $-$ Dedicated Account Servicing/Success Costs | Dedicated customer success, SLAs, field engineers | Customer portfolio tiering and contract renegotiation |
| CM IV (Channel Margin) | CM III $-$ Dedicated Channel/Salesforce Overhead | Regional sales pods, partner commissions, logistics | Route-to-market and channel partner investment |
| Operating Profit | CM IV $-$ Common Enterprise Overhead | Central corporate executive, legal, compliance | Long-term corporate viability and tax planning |
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Reference & Evidence
Source: Author's managerial accounting framework grounded in cost behavior and customer profitability principles from Zbaracki et al. (2004), Reinartz and Kumar (2000), Lawrence et al. (2019), and Mulhern (1999).
Each line is a claim from the register this journal publishes against, resolved from the register at build time.
- A The paper is METHOD, not an empirical finding, in its own words: "This paper provides a conceptual and methodological foundation for measuring customer profitability" by extending customer-lifetime-value approaches to broader target-marketing applications. Mulhern. (1999) ·
MUL99-C1
Grades: A, verified against the printed page of the primary source · B, primary source, text layer only · C, authoritative secondary · D, reported.