Design methodology resource pack — 2026-05-09¶
Purpose: source pack for product-management and design agents that need durable context for Design Thinking, User-Centered Design (UCD), Human-Centered Design (HCD), Service Design, Service Blueprinting, and the Double Diamond.
Harvest method: web fetch + human synthesis. Use this as source provenance and a lightweight context layer; do not paste raw article text into prompts unless a task needs exact wording.
Quality bar¶
Sources were selected because they are official, standards-based, or widely used by design/product teams. They emphasize practical application for product discovery, problem framing, ideation, prototyping, testing, and service-system design.
Fresh resources¶
| # | Source | Category | Agent-useful takeaway |
|---|---|---|---|
| 1 | Design Council — The Double Diamond | Double Diamond | Use Discover, Define, Develop, Deliver to alternate divergent and convergent thinking. The first diamond prevents assumed problems; the second explores and tests possible answers. |
| 2 | ISO 9241-210:2019 — Human-centred design for interactive systems | Human-centered design | HCD is a managed life-cycle discipline for interactive systems. It keeps human-system interaction, usability, ergonomics, and project planning connected throughout design and development. |
| 3 | NN/g — Design Thinking 101 | Design thinking | Design thinking frames product work as iterative movement through understanding, exploring, and materializing: empathize, define, ideate, prototype, test, implement. |
| 4 | Interaction Design Foundation — User-Centered Design | UCD | UCD keeps users involved throughout design. Use it to anchor requirements, interaction flows, and validation in observed user goals, tasks, and constraints. |
| 5 | Interaction Design Foundation — Five Stages in the Design Thinking Process | Design thinking | The five-stage model is non-linear: empathize, define, ideate, prototype, and test can loop as learning changes the problem or solution. |
| 6 | NN/g — Service Design 101 | Service design | Service design plans and organizes people, props, and processes so backstage operations support frontstage customer and employee experiences. |
| 7 | NN/g — Service Blueprints | Service blueprinting | Service blueprints connect customer actions, frontstage actions, backstage actions, processes, evidence, and dependency lines for one journey. Use them for complex, cross-functional services. |
| 8 | IBM — Enterprise Design Thinking | Enterprise design thinking | Enterprise Design Thinking gives teams shared language to align around user outcomes, empathy, speed, and cross-functional delivery in complex organizations. |
Synthesis for product-management agents¶
When to load this pack¶
Load this pack when the user mentions design thinking, UCD, HCD, human-centered design, service design, service blueprint, Double Diamond, experience design, user research, product discovery, product design, journey mapping, prototyping, usability testing, or "designing" a product/service.
Method selection¶
| Situation | Prefer |
|---|---|
| The team may be solving the wrong problem | Double Diamond Discover/Define or UCD research loop |
| The problem is known but solution space is broad | Design Thinking ideate/prototype/test loop |
| The experience spans departments, policies, operations, or support | Service Design and Service Blueprinting |
| The work must meet usability and human-system interaction standards | Human-Centered Design / ISO 9241-210 lens |
| The organization needs shared language and cross-functional alignment | Enterprise Design Thinking |
Core concepts¶
- Design Thinking: iterative, collaborative problem solving grounded in empathy and experimentation.
- UCD: design process that keeps user goals, tasks, contexts, and feedback central throughout the life cycle.
- HCD: broader discipline that designs interactive systems around human needs, capabilities, limitations, context, and usability.
- Double Diamond: divergent discovery, convergent definition, divergent development, convergent delivery.
- Service Design: design of the organizational system that enables the customer and employee experience.
- Service Blueprint: operational map of customer actions, visible touchpoints, backstage work, support processes, evidence, and dependencies.
Agent behavior¶
When designing a product or service, the agent should:
- Identify whether the task is problem framing, concept generation, solution validation, or service-system alignment.
- Start with users, context, and evidence before proposing solutions.
- Make divergence and convergence explicit: explore broadly, then narrow with criteria.
- Separate customer-facing experience from backstage operations.
- Produce a concrete artifact: design brief, Double Diamond plan, UCD/HCD checklist, prototype/test plan, or service blueprint outline.
Gaps to hydrate next¶
- IDEO Design Kit methods if a fetchable page is available.
- GOV.UK Service Manual if access permits.
- Official Stanford d.school design thinking material.
- Accessibility-specific design methods tied to WCAG.