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METHOD

BOUND Method v3.0

Boundary-Oriented Unified Development moves the first architectural question from interface shape to responsibility ownership.

The lifecycle

Domain
Boundary
Contract
Execution
Verification

Domain

Establish the system context before defining responsibility boundaries. Relevant domain concerns can include capability, deployment, trust, persistence, runtime, latency, and recovery.

Boundary

A BOUND boundary is a responsibility boundary: who owns a decision, what a component owns, what it may decide, what it exposes, what it consumes, and which dependencies are forbidden.

Contract

Contracts make boundary behaviour explicit enough for independent implementation and verification. They can cover schemas, types, nullability, ranges and units, errors, retries, timeouts, ordering, concurrency, serialization, trust, compatibility, versioning, and state ownership.

Contract Freeze is controlled change. It does not mean that a contract can never evolve. A revision becomes an explicit engineering event with compatibility and migration consequences.

Execution

Once responsibility and cross-boundary behaviour are explicit, teams can implement independently inside their assigned boundaries. Coordination is concentrated around architectural decisions and durable artifacts rather than continuous implementation-level synchronization.

Verification

Verification is continuous. Useful evidence includes contract tests, schema and compatibility checks, consumer/provider vectors, integration tests, static analysis, CI gates, and runtime checks.

IFEM → BOUND

IFEM established an interface-first execution sequence: Interface → Contract → Execution → Verification. BOUND retains that execution philosophy while making Domain and Boundary explicit before the contract.

IFEM   : Interface → Contract → Execution → Verification
BOUND  : Domain → Boundary → Contract → Execution → Verification