The Architecture Ledger: Pricing Cost, Risk and Forfeited Flexibility on a Mined Dependency Graph

Abstract

In the consumption era, enterprises rent infrastructure but retain ownership of their architectural arrangement: thespecific configuration of dependencies through which business work is executed. That arrangement is economicallyconsequential. It determines the machine resource consumed per unit of business work, it concentrates operational risk,and it forecloses or preserves future options. It is nevertheless absent from the enterprise measurement regime,governed instead by heat maps, maturity models and colour-coded risk registers.This paper proposes the Architecture Ledger, a standing measurement practice that treats the mined dependency graphas a ledger and pins three distributional quantities to each use case within a named business subdomain: metered costexpressed as a coefficient of business volume, monetary risk expressed as loss distributions, and a forfeited-option termexpressing the flexibility destroyed by commitment decisions.The contribution is explicitly one of integration rather than invention. A structured occupancy analysis across sevenframework elements finds four to be occupied or partially occupied by existing commercial and academic work, andthree to be open: the inverted-sign treatment of real options, telemetry-derived volatility as a valuation input, and pricedepistemic decay. No identified vendor or research group performs the full integration.The paper reports a worked demonstration on a single use case, states nine falsifiable hypotheses with explicit killconditions, and documents a correction history of twenty-one logged errors across three versions of the formalspecification. That history is presented as evidence rather than as an apology: in a field with a documented record offailed quantification attempts, a visible correction sequence is the available evidence that a method exists.