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This page is part of the ForgeSDLC knowledge base — an AI-assisted, human-directed methodology for taking product work from concept to production. For the core operating model and vocabulary, see Forge SDLC overview and What is ForgeSDLC?.

External reference URLs (methodology guides)

Curated list of https targets cited in blueprints/sdlc/methodologies/ and mirrored in docs/methodologies-*.html and in generated Process & flows pages (methodologies-*-process.html). When you change a URL in Markdown, update the matching handbook page’s “Authoritative sources” / “Authoritative sources & further reading” section (and re-run build_methodology_chapters.py for generated HTML).

Each row includes an executive summary: what the link is and why this blueprint points to it, so readers can decide whether to open it.

Topic URL Executive summary (why it’s linked here)
Agile Manifesto https://agilemanifesto.org/ The original four values (2001); defines what “Agile” means before you pick Scrum, Kanban, or XP.
Twelve Principles https://agilemanifesto.org/principles.html Turns the manifesto into concrete principles (delivery, feedback, sustainability)—useful for aligning SDLC phases with Agile intent.
Agile Alliance (home) https://www.agilealliance.org/ Nonprofit community hub: articles, events, and pointers—neutral background, not a replacement for your process docs.
Agile Alliance — Subway map https://www.agilealliance.org/subway Visual map of Agile-related practices; good orientation, not a prescribed workflow.
Agile Alliance — Agile glossary https://www.agilealliance.org/agile101/agile-glossary/ Searchable terms (e.g. Scrum, Kanban, XP)—shared vocabulary for teams using this blueprint.
Scrum Guide https://scrumguides.org/scrum-guide.html Official definition of Scrum (accountabilities, events, artifacts)—the authority for mapping Phases A–F to Scrum.
Scrum.org — What is Scrum? https://www.scrum.org/resources/what-is-scrum Training org’s intro and learning context; complements the Guide, not a second standard.
Scrum.org — Kanban Guide for Scrum Teams https://www.scrum.org/resources/kanban-guide-scrum-teams How Kanban flow practices integrate with Scrum—for teams blending both under one cadence.
Agile Alliance — Kanban (glossary) https://www.agilealliance.org/glossary/kanban/ Short definition and manufacturing roots—quick grounding before reading Kanban guides.
Kanban University — The Kanban Guide https://kanban.university/kanban-guide Current guide text for the Kanban method (practices, evolution of the Guide).
ProKanban.org https://prokanban.org/ Professional Kanban community—training and certification paths; optional depth.
Agile Alliance — Scrum (glossary) https://www.agilealliance.org/glossary/scrum/ Short Scrum entry plus community context—handy glossary alongside the Guide.
ISO/IEC/IEEE 12207 (catalogue) https://www.iso.org/standard/63712.html International standard for software life-cycle processes—formal anchor for phased/regulated delivery (catalogue entry; full text is paid/licensed).
PMI — Standards & guides https://www.pmi.org/standards PMBOK and related standards—common vocabulary for phases, knowledge areas, and governance when formalizing gates and project framing (complements ISO 12207). Note: some environments get HTTP 403 to pmi.org from automated curl; try a normal browser.
Wikipedia — PMBOK https://en.wikipedia.org/wiki/Project_Management_Body_of_Knowledge Overview of PMI’s Project Management Body of Knowledge—phases and knowledge areas in encyclopedia form when licensed PMBOK text is unavailable.
Wikipedia — Waterfall model https://en.wikipedia.org/wiki/Waterfall_model Informal history and diagram of sequential phases—context for phased delivery, not a standard.
Wikipedia — Software development process (Waterfall section) https://en.wikipedia.org/wiki/Software_development_process#Waterfall_development Waterfall as one lifecycle among many—helps compare with iterative approaches.
Wikipedia — Agile software development https://en.wikipedia.org/wiki/Agile_software_development Contrast between iterative Agile and plan-driven lifecycles—useful when arguing hybrids (phased gates + iterative build).
Wikipedia — Extreme programming https://en.wikipedia.org/wiki/Extreme_programming Stable overview of XP practices and history—entry point before deeper books or practitioner sites.
Ron Jeffries — XP https://ronjeffries.com/xprog/ Practitioner perspective on XP—stories and guidance from a signatory-level voice.
Martin Fowler — XP (Bliki) https://martinfowler.com/bliki/ExtremeProgramming.html Short expert summary of XP on a widely cited blog—quick read.
Wiki.c2 — Extreme Programming Roadmap https://wiki.c2.com/?ExtremeProgrammingRoadmap Classic wiki index of XP topics—dated but historically influential.
Wikipedia — Lean software development https://en.wikipedia.org/wiki/Lean_software_development Stable overview of the seven Poppendieck principles, history, and relationship to manufacturing Lean—entry point before the books.
Wikipedia — Toyota Production System https://en.wikipedia.org/wiki/Toyota_Production_System Manufacturing roots of Lean—understanding TPS clarifies why "waste" and "pull" matter in software.
Agile Alliance — Lean software development https://www.agilealliance.org/glossary/lean-software-development/ Short definition in the Agile glossary—shared vocabulary for Lean.
Lean Enterprise Institute https://www.lean.org/ Practitioner community for Lean thinking—manufacturing and beyond; optional depth.
Wikipedia — Spiral model https://en.wikipedia.org/wiki/Spiral_model Stable overview of Boehm's risk-driven model—quadrants, anchor-point milestones, history.
Wikipedia — Barry Boehm https://en.wikipedia.org/wiki/Barry_Boehm Author biography—context for the Spiral Model's origins in defense/aerospace.
Wikipedia — V-model (software development) https://en.wikipedia.org/wiki/V-model_(software_development) Stable overview of the V-Model—phases, traceability pairing, and comparison with Waterfall.
Wikipedia — Verification and validation https://en.wikipedia.org/wiki/Verification_and_validation Foundational V&V concepts—"building the right product" vs "building the product right."
ISO 26262 (catalogue) https://www.iso.org/standard/68383.html Automotive functional safety standard mandating V-Model-style development (catalogue; full text licensed).
Wikipedia — DevOps https://en.wikipedia.org/wiki/DevOps Stable overview of DevOps history, practices, and culture—entry point before vendor-specific guidance.
Wikipedia — CI/CD https://en.wikipedia.org/wiki/CI/CD Continuous integration and delivery—the technical backbone of DevOps pipelines.
DORA — DevOps Research and Assessment https://dora.dev/ Research-backed DevOps metrics and capabilities; the four key metrics (deployment frequency, lead time, CFR, MTTR).
Google SRE Book https://sre.google/sre-book/table-of-contents/ Free online SRE practices and principles—companion to DevOps methodology.
Wikipedia — Feature-driven development https://en.wikipedia.org/wiki/Feature-driven_development Stable overview of FDD's five activities, roles, and feature-centric approach.
Agile Alliance — FDD https://www.agilealliance.org/glossary/fdd/ Short definition of Feature-Driven Development in the Agile glossary.
Wikipedia — Crystal Clear https://en.wikipedia.org/wiki/Crystal_Clear_(software_development) Stable overview of the most common Crystal variant—properties and scaling.
Wikipedia — DSDM https://en.wikipedia.org/wiki/Dynamic_systems_development_method Stable overview of DSDM phases, principles, and MoSCoW prioritization.
Agile Business Consortium https://www.agilebusiness.org/ Official DSDM body—framework documentation, training, certification.
Shape Up (free book) https://basecamp.com/shapeup Official Shape Up book by Ryan Singer—complete methodology description, free online.
PMI — Disciplined Agile https://www.pmi.org/disciplined-agile Official DA body of knowledge—goal diagrams, lifecycles, process options (PMI-owned).
Wikipedia — Disciplined agile delivery https://en.wikipedia.org/wiki/Disciplined_agile_delivery Stable overview of DA's approach, lifecycles, and relationship to other Agile methods.
Wikipedia — Behavior-driven development https://en.wikipedia.org/wiki/Behavior-driven_development Stable overview of BDD—Given-When-Then, tools, relationship to TDD.
Dan North — Introducing BDD https://dannorth.net/introducing-bdd/ Original BDD article by its creator—motivation and initial formulation.
Cucumber — BDD overview https://cucumber.io/docs/bdd/ Practitioner guide to BDD with a popular tool—process and anti-patterns.
Wikipedia — Rapid application development https://en.wikipedia.org/wiki/Rapid_application_development Stable overview of RAD—phases, tools, prototyping-centric approach.
OWASP — Top 10 for LLM Applications https://owasp.org/www-project-top-10-for-large-language-model-applications/ Security risks when LLMs touch design, code, or data in the SDLC—essential for agentic / AI-assisted workflows.

Quick verification (maintainers)

From a shell, expect HTTP 200 (some sites return 301 then 200 when following redirects):

urls=(
  https://agilemanifesto.org/
  https://www.scrum.org/resources/what-is-scrum
  https://kanban.university/kanban-guide
  https://owasp.org/www-project-top-10-for-large-language-model-applications/
)
for u in "${urls[@]}"; do
  printf '%s ' "$(curl -sS -o /dev/null -w '%{http_code}' -L --max-time 15 "$u")"
  echo "$u"
done

Expand the array with any new links before merging doc changes.