FDM.3:10 - Architectural Rationale

Events and their conditions are central because an instrument’s financial behavior depends on how the arrangement responds over time. A flat amount-and-date record can be sufficient for a simple fixed obligation; it needs extension when conditions alter that obligation.

Separating contractual behavior from performance keeps both interpretable. A single blended “forecast cash flow” can be useful to its intended decision, but its construction must retain the contractual and scenario meanings needed to explain or revise it.