Scrum normative-source · The Scrum Guide, November 2020 (official current version reviewed 25 August 2026) | One cohesive Scrum Team is solving a complex product problem and can inspect a usable Increment against a Product Goal in Sprints. | Keep the Scrum accountabilities, events, artifacts and commitments intact; selected supporting practices do not become Scrum by name. | Scrum can organise team-level empirical product development inside a Product System gate; the gate supplies the wider business, field and assurance decision. | A Sprint boundary does not by itself prove hardware integration, field acceptance, safety, commercial viability or release readiness. |
|---|
Kanban normative-source · The Kanban Guide, May 2025 (v2025.5, reviewed 25 August 2026) | Work arrives continuously, service and integration demand varies, or the organisation needs to improve effectiveness, efficiency and predictability through flow. | Define and visualise the workflow, actively manage items, improve the workflow, control work in progress and use context-relevant flow metrics. | Kanban can manage evidence, delivery, integration, service or portfolio flow between Product System decisions and can complement other delivery techniques. | A board without an explicit Definition of Workflow, work-in-progress control and improvement loop is visual task tracking, not sufficient method evidence. |
|---|
Nexus normative-source · The Nexus Guide, January 2021 (reviewed 25 August 2026) | Approximately three to nine Scrum Teams work from one Product Backlog toward one integrated product and cross-team dependencies are the central constraint. | Retain Scrum, one Product Owner, one Product Backlog, a Nexus Sprint Goal and an Integrated Increment; add the Nexus Integration Team and Nexus events as defined. | Nexus can coordinate multi-team product development inside a shared Product System product boundary and evidence gate. | Do not add a scaling framework when product boundaries or integration ownership are still unclear; fewer teams may reduce complexity more effectively. |
|---|
SAFe normative-source · Current Scaled Agile Framework web guidance (reviewed 25 August 2026) | A real portfolio and multiple teams or trains need strategy-and-investment alignment, portfolio governance and coordinated solution delivery across value streams. | Define the portfolio and value streams, make funding and governance explicit, and organise teams around a shared business and technology mission rather than copying ceremonies. | SAFe can provide portfolio and multi-team flow around Product System decisions; the Product System still defines the product claim, evidence gate and reversal condition. | Use only the coordination needed by the actual scale and dependencies. Framework installation is not evidence of customer value, technical quality or organisational transformation. |
|---|
Systems engineering and verification normative-source · NASA Systems Engineering Handbook Rev 2 (reviewed 25 August 2026) | The product spans interacting hardware, software, people and environments and needs disciplined definition, realisation, verification, validation and technical management. | Maintain requirement, interface, configuration, verification and validation traceability appropriate to the system and its risk. | Systems engineering supplies technical authority and evidence across discovery, productization, integration, launch and change; product leadership integrates it into the product decision. | Technical verification does not decide market value, adoption, pricing or portfolio priority, and product leadership does not replace engineering authority. |
|---|
Continuous delivery and DORA research-source · DORA software delivery performance guidance, updated 5 January 2026 (reviewed 25 August 2026) | A software or service path needs safer, faster change flow with system-level feedback on throughput and deployment instability. | Measure the current five metrics in application or service context: change lead time, deployment frequency, failed-deployment recovery time, change fail rate and deployment rework rate. | Delivery performance informs productization, launch and scale decisions; Physical AI adds hardware, integration, field, safety and service evidence beyond software deployment. | Do not turn delivery metrics into individual targets or treat software deployment speed as the complete operated-product outcome. |
|---|