| Current-state architecture pack | Create a shared evidence base | Platforms, domains, interfaces, data flows, dependencies, controls, costs, and known limitations | Architecture, data, platform, security, risk |
| Workload placement assessment | Support environment decisions | Criteria, workload classification, constraints, candidate placement, assumptions, and exceptions | CIO, CTO, architecture review board, procurement |
| Target-state hybrid blueprint | Define the intended architecture | Platform roles, interoperability, shared services, trust boundaries, resilience, and operating responsibilities | Executives, enterprise architects, programme teams |
| Integration and data-movement patterns | Reduce bespoke connections | Approved batch, streaming, API, replication, sharing, virtualisation, and event patterns | Engineering, integration, application teams |
| Control and responsibility matrix | Make governance actionable | Security, privacy, residency, retention, access, monitoring, ownership, evidence, and escalation | Security, privacy, risk, audit, data owners |
| Transition roadmap | Sequence practical change | Waves, dependencies, pilots, decision gates, resourcing, decommissioning, risks, and measures | Transformation office, finance, delivery leaders |
| Architecture standards and playbook | Support consistent implementation | Principles, reusable patterns, review criteria, exception process, and decision templates | Architecture, engineering, vendors, delivery assurance |