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 (PDLC approach guides)
Curated list of https targets cited in blueprints/pdlc/approaches/ and in PDLC-SDLC-BRIDGE.md. When you change a URL in Markdown, update the matching approach guide's "Authoritative sources" section.
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.
Product management & discovery
| Topic | URL | Executive summary (why it's linked here) |
|---|---|---|
| Marty Cagan — SVPG (Inspired / Empowered) | https://www.svpg.com/inspired-how-to-create-tech-products-customers-love/ | Foundational text on modern product management: product trio, discovery, empowered teams. Philosophical anchor for PDLC thinking about outcomes over outputs. |
| Marty Cagan — Dual-Track Agile | https://www.svpg.com/dual-track-agile/ | Origin framing for running discovery and delivery in parallel — defines why the product trio co-owns discovery alongside engineering delivery. |
| SVPG — Product Discovery | https://www.svpg.com/product-discovery/ | Collection of articles on discovery practices — risk assessment, opportunity assessment, prototyping — from the SVPG team. |
| Teresa Torres — Continuous Discovery Habits | https://www.producttalk.org/2021/08/continuous-discovery-habits/ | Practical framework for weekly discovery: opportunity solution trees, interview cadence, assumption mapping. Operationalizes PDLC P1–P2 as ongoing practice. |
| Teresa Torres — Opportunity Solution Trees | https://www.producttalk.org/2023/12/opportunity-solution-trees/ | Canonical source for the OST framework — visual structure connecting outcomes → opportunities → solutions → experiments. |
| Product Talk (blog) | https://www.producttalk.org/ | Blog and community from Teresa Torres — ongoing articles on discovery, experimentation, and product trio practices. |
| Melissa Perri — Escaping the Build Trap | https://melissaperri.com/book | Diagnosis and cure for organizations that ship features without validating outcomes — directly addresses the "SDLC without PDLC" anti-pattern. |
| Mind the Product | https://www.mindtheproduct.com/ | Community hub for product management: conferences, articles, and frameworks — neutral background for PDLC vocabulary. |
| Product School — Resources | https://productschool.com/blog | Practitioner content on product management — OSTs, discovery, metrics, team structures. |
Lean Startup & experimentation
| Topic | URL | Executive summary (why it's linked here) |
|---|---|---|
| Eric Ries — The Lean Startup | http://theleanstartup.com/ | Canonical text defining Build-Measure-Learn, MVP, validated learning, pivot/persevere. The reference for hypothesis-driven product development. |
| Steve Blank — Customer Development | https://steveblank.com/category/customer-development/ | Precursor framework to Lean Startup: Customer Discovery → Validation → Creation → Building. Business-model-validation layer. |
| Ash Maurya — Running Lean / Lean Stack | https://leanstack.com/running-lean-book | Practitioner playbook for applying Lean Startup — Lean Canvas, experiment design, metrics that matter. |
| Jeff Gothelf — Lean UX | https://www.jeffgothelf.com/lean-ux-book/ | UX + Lean Startup integration — hypotheses, experiments, outcomes in Agile teams. Bridges design practice with delivery. |
| Jeff Patton — Dual Track Development | https://www.jpattonassociates.com/dual-track-development/ | Practical guidance on separating learning work from building work — visual models for dual-track implementation. |
Design Thinking
| Topic | URL | Executive summary (why it's linked here) |
|---|---|---|
| IDEO — Design Thinking | https://designthinking.ideo.com/ | Origin framework — Empathize, Define, Ideate, Prototype, Test. Defines human-centered design principles used in PDLC P1–P2. |
| Stanford d.school | https://dschool.stanford.edu/ | Academic anchor for Design Thinking education — process guides, teaching materials, and the "bootcamp bootleg" toolkit. |
| British Design Council — Double Diamond | https://www.designcouncil.org.uk/our-resources/the-double-diamond/ | Double Diamond model — canonical visualization of diverge/converge across problem and solution spaces. |
| Nielsen Norman Group — Design Thinking | https://www.nngroup.com/articles/design-thinking/ | Evidence-based practitioner summary of when Design Thinking works and its limitations. |
Stage-Gate & governance
| Topic | URL | Executive summary (why it's linked here) |
|---|---|---|
| Stage-Gate International | https://www.stage-gate.com/ | Official Stage-Gate body of knowledge — Robert Cooper's framework, 5th-generation updates, research. Authority for gate criteria and stage definitions. |
| 5th-Generation Stage-Gate Model | https://www.stage-gate.com/about/5th-generation-stage-gate-model/ | Current evolution: iterative stages, Agile integration, lean gates, adaptive governance. Addresses historical rigidity criticism. |
| PDMA — Product Development and Management Association | https://community.pdma.org/ | Practitioner community for product development — research, benchmarking, and Stage-Gate updates from Robert Cooper. |
Product lifecycle & growth
| Topic | URL | Executive summary (why it's linked here) |
|---|---|---|
| ProductPlan — Product Lifecycle | https://productplan.com/glossary/product-lifecycle/ | Clear overview of lifecycle stages (Introduction, Growth, Maturity, Decline) with strategic implications. Starting reference for PLM. |
| ProductPlan — End-of-Life | https://productplan.com/learn/how-to-end-of-life-product/ | Practical checklist for product retirement — communications, migration, support wind-down. Informs P6 sunset planning. |
| Product Marketing Alliance — Sunsetting | https://productmarketingalliance.com/how-to-sunset-product-complete-guide-examples/ | Complete guide with real examples of product sunset strategies — phased approach, stakeholder management. |
| Reforge — Growth Series | https://www.reforge.com/growth-series | Growth frameworks for post-launch: acquisition, activation, retention, revenue, referral. Deepens P5 Grow. |
| DORA — State of DevOps | https://dora.dev/ | Delivery metrics research (DORA four key metrics) — the SDLC side of the metrics comparison in the bridge document. |
Quick verification (maintainers)
From a shell, expect HTTP 200 (some sites return 301 then 200 when following redirects):
urls=(
https://www.svpg.com/inspired-how-to-create-tech-products-customers-love/
https://www.producttalk.org/2021/08/continuous-discovery-habits/
http://theleanstartup.com/
https://designthinking.ideo.com/
https://www.stage-gate.com/
https://productplan.com/glossary/product-lifecycle/
https://dora.dev/
https://www.designcouncil.org.uk/our-resources/the-double-diamond/
)
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.