Design

3.1–3.3Lessons▼

• 3.1From use case to verifiable requirement

  You translate a use case into a verifiable requirement with traceability.

• 3.2Baselines, regulation and applicability

  You determine specification basis, maturity and applicability separately.

• 3.3Architecture and integration decisions

  You justify an architecture decision using alternatives and evidence.

• 3.4Analysing and diagnosing voice services

  You analyse voice faults using correlated control and media observations.

• 3.5Testing data services and application integration

  You investigate a data fault at service, gateway and application boundaries.

• 3.6Radio coverage and link budget

  You calculate a link budget and explain its limitations.

• 3.7Performance, load and delay budgets

  You assess load, delay budgets and percentiles using appropriate measurement boundaries.

• 3.8Cybersecurity and trust boundaries

  You connect protection needs, trust boundaries and recovery tests.

• 3.9Interoperability, public networks and borders

  You assess a specific network-service combination across operator boundaries.

• 3.10Planning and demonstrating interworking

  You create an IWF function matrix with meaningful evidence levels.

• 3.11Assessing test tracks and pilot projects

  You assess pilot reports by findings, limitations and transferability.

• 3.12Migration in manageable steps

  You plan migration states with approval and rollback criteria.

• 3.13Validation, acceptance and regression

  You distinguish demonstration, validation, acceptance and regression.

• 3.14Operations, RAMS and SLAs

  You define service boundaries, operating responsibility and shared dependencies.

• 3.15Use-case-based procurement, compliance and TCO

  You connect use cases, compliance evidence and lifecycle costs.

• 3.16Final case: an evidence-based decision paper

  You create a consistent decision paper with a bounded approval scope.