Skip to main content

What Are "Tools for Thinking"?

  • Externalise cognition — Turn mental models into visible structures
  • Reduce mental load — Free working memory for higher-order thinking
  • Enable shared understanding — Create common ground for collective reasoning
  • Support iteration — Make thinking visible so it can be refined

Inspired by Maggie Appleton's concept of tools for thinking — the idea that tools shape not just what we do, but how we think.

Written For

Service Designers, Product Managers, User-Centred Design practitioners—and anyone who's hit a wall in their thinking

How to Use This Page

"Start with the kind of thinking you need, not the method you already know."

Rather than browsing tools alphabetically, begin by asking: what kind of cognitive work am I trying to do? Each category below represents a different mode of thinking that service design requires.

Part 1: Analytical Thinking

Tools for Clarifying and Understanding

These tools help you see what already exists but remains invisible—making hidden structures, relationships, and patterns tangible enough to reason about.

Making the Invisible Visible

Tools that externalise hidden structures, relationships, and assumptions that shape services but remain unseen in conversation alone.

Service Blueprint

Separates what users see from what makes it possible

  • Distinguish frontstage (visible) from backstage (invisible) service elements
  • Identify where service delivery depends on unseen processes
  • Spot where breakdowns happen between what customers experience and what teams deliver

When the service feels fragmented, when teams don't understand how their work connects to customer experience, or when handoffs between departments create friction

Ecosystem Map

Reveals how a service exists within a web of actors and relationships

  • See beyond the direct service provider-user relationship
  • Identify dependencies, influences, and power dynamics
  • Understand how value flows through multiple stakeholders

When designing services that involve multiple organisations, when policy intersects with delivery, or when understanding who influences whom matters more than what the service does

Stakeholder Map

Turns informal networks into visible patterns of influence and interest

  • Identify who cares about what, and why
  • Map relationships, power, and information flows
  • Anticipate resistance, support, or unexpected consequences

Before making changes that affect multiple groups, when politics matter as much as design, or when the hardest work is securing buy-in

Thinking in Time

Tools that transform temporal experience into visible structures, helping designers reason about sequence, duration, and change.

Journey Map

Converts lived experience into a shared timeline for reasoning

  • See a service as users experience it, moment by moment
  • Identify emotional highs, lows, and moments of truth
  • Understand where time feels compressed, extended, or wasted

When different teams describe the "customer experience" differently, when timing and sequence matter, or when emotional impact shapes success

Experience Timeline

Extends attention across longer durations than single journeys

  • Recognise patterns across multiple service interactions
  • See how relationships with services evolve over weeks, months, or years
  • Identify triggers, transitions, and life events that change needs

When services span long timeframes, when understanding lifecycle matters more than individual touchpoints, or when you need to design for sustained relationships rather than single transactions

Future State Vision

Makes desired futures concrete enough to work towards

  • Align teams around a shared picture of what success looks like
  • Create a reference point for evaluating proposed changes
  • Bridge abstract goals with tangible service characteristics

When strategy needs translating into design direction, when teams need alignment before detailed work begins, or when the gap between current and desired states needs clarifying

Thinking in Systems

Tools for seeing patterns of interconnection, understanding feedback loops, and reasoning about how parts influence wholes.

System Map

Reveals how components interact to produce behaviour

  • Understand feedback loops that amplify or dampen change
  • Identify unintended consequences of interventions
  • See where small changes might have disproportionate effects

When problems keep recurring despite fixes, when cause and effect seem distant, or when understanding dynamics matters more than mapping structure

Value Flow Diagram

Traces how value moves and transforms through a system

  • Identify where value is created, transferred, or lost
  • Understand exchanges between stakeholders
  • Spot where value misalignments create friction

When designing multi-sided platforms, when questioning what people exchange (beyond money), or when understanding incentives and motivations

Dependency Network

Makes implicit interdependencies explicit and manageable

  • Identify which elements must exist for others to work
  • Understand sequencing constraints and risks
  • Plan implementation order based on what enables what

During implementation planning, when coordinating work across teams, or when a single failure point could cascade through the service

Thinking with People

Tools that externalise individual perspectives, enabling groups to think together and build shared understanding.

Co-Design Session

Turns stakeholders from subjects into co-thinkers

  • Surface tacit knowledge that interviews miss
  • Build ownership and alignment through active participation
  • Generate ideas grounded in lived experience

When people closest to problems should shape solutions, when buy-in matters as much as the idea, or when expertise is distributed rather than centralised

Collaborative Mapping

Converts individual mental models into negotiated shared representations

  • Make invisible assumptions visible and discussable
  • Identify where people see the same situation differently
  • Create a common language for talking about complexity

When teams use the same words to mean different things, when integration across silos matters, or when the act of mapping is as valuable as the map

Research Synthesis Workshop

Transforms research data into actionable shared insights

  • Move from "interesting findings" to "what this means for design"
  • Build team alignment around what matters most
  • Create shared ownership of research insights

After research, before design—when findings need becoming insights, when teams need unifying around evidence, or when data exists but direction doesn't

Thinking about Value

Tools for understanding what makes services valuable, how value is perceived, and what people are really trying to achieve.

Jobs to Be Done

Shifts focus from what users do to what they are trying to achieve

  • Understand the real progress people seek
  • See beyond stated requirements to underlying motivations
  • Identify competitors you wouldn't otherwise consider

When user requests conflict with each other, when adoption is low despite meeting requirements, or when you need to understand the "why" behind behaviour

Value Proposition Canvas

Makes value creation explicit and testable

  • Match what you offer to what people need
  • Identify where pain points meet pain relievers
  • Clarify what makes your service relevant

When positioning a service, when prioritising features, or when articulating why someone would choose your service over alternatives

Outcome Mapping

Connects activities to intended changes in people's lives

  • Distinguish outputs (what you deliver) from outcomes (what changes)
  • Identify leading indicators of success
  • Design for impact rather than activity

When defining success, when measurement focuses on the wrong things, or when you need to justify why a service should exist

Thinking through Constraints

Tools for making constraints visible and productive—turning limitations into design parameters rather than obstacles.

Constraint Mapping

Transforms vague limitations into specific design boundaries

  • Distinguish hard constraints (immovable) from soft ones (negotiable)
  • Identify which constraints shape the problem space most
  • Focus creative energy where it can make a difference

When 'it can't be done' dominates conversations, when distinguishing real limits from assumed ones matters, or when constraints need becoming enablers

Feasibility Matrix

Makes trade-offs between desirability and viability explicit

  • Balance what users want with what is buildable
  • Identify quick wins and strategic bets
  • Prioritise based on impact and effort

When everything seems equally important, when resources are limited, or when deciding what to build first

Assumption Testing

Converts beliefs into testable hypotheses

  • Identify which assumptions, if wrong, would invalidate the service
  • Focus validation effort where it matters most
  • Reduce risk by testing cheaply before building

Before committing resources, when opinions clash, or when you need to reduce uncertainty without building everything

Thinking in Prototypes

Tools that make abstract concepts tangible and testable—enabling learning through making rather than discussing.

Service Prototype

Tests service ideas before building infrastructure

  • Learn from real interactions without full implementation
  • Identify what matters and what does not before investing heavily
  • Create evidence that changes minds better than documents

When stakeholders need convincing, when major assumptions need testing, or when "talking about it" has stopped producing insights

Experience Simulation

Enables stakeholders to feel services rather than just understand them

  • Build empathy through embodied experience
  • Surface issues that descriptions miss
  • Create shared reference experiences for decision-making

When stakeholders are removed from user reality, when emotional impact matters, or when you need to demonstrate rather than explain

Wizard of Oz Prototype

Separates testing user experience from building technology

  • Validate service value before technical investment
  • Test multiple variations cheaply and quickly
  • Focus on whether people want it before proving you can build it

When technology is expensive or uncertain, when testing demand before supply, or when user testing needs happening now

Thinking about Change

Tools for designing transitions—helping services and organisations move from current to future states.

Transition Design

Focuses on the journey of change, not just the destination

  • Design for adoption, not just launch
  • Identify what needs phasing in or out when
  • Understand how people and systems adapt over time

When changing existing services, when legacy systems constrain the future, or when transformation spans years not months

Change Readiness Assessment

Makes organisational capacity for change visible and addressable

  • Identify what enables or prevents change
  • Understand where resistance will come from and why
  • Sequence changes to build momentum

Before transformational initiatives, when previous change efforts failed, or when organisational dynamics matter as much as service design

Migration Planning

Bridges old and new without service disruption

  • Maintain service continuity during transformation
  • Identify what can coexist and what must be sequenced
  • Manage risks of running parallel systems

When replacing legacy services, when users cannot all move at once, or when 'big bang' launches are too risky

Part 2: Lateral Thinking

Tools for Breaking Stuck Patterns

The tools above help clarify what already exists. The tools below help you see what does not yet exist—by deliberately disrupting habitual thinking.

Lateral Provocations

These tools deliberately disrupt habitual thinking. They help you escape stuck patterns and see genuinely different possibilities.

Service Provocation (PO)

Uses deliberately provocative statements to escape stuck patterns

  • Break free from incremental thinking
  • Generate genuinely novel service concepts
  • Challenge industry orthodoxies that constrain innovation

When your team keeps proposing the same safe ideas, when competitors all solve the problem the same way, or when you need to break through to truly different thinking

What if we charged customers more when the service fails?

Random Injection

Forces connections between unrelated concepts to spark new thinking

  • Escape mental ruts by introducing unrelated stimuli
  • Create unexpected service combinations
  • Find inspiration outside your domain

When brainstorming feels circular, when the team is too close to the problem, or when you need fresh perspectives on a mature service

How would we design this service if it worked like a music festival?

Concept Fan

Steps back from solutions to explore alternative ways of achieving the same purpose

  • Move from "how" questions to "why" questions
  • Discover alternative paths to the same outcome
  • See your service as one answer among many possible answers

When stuck on implementation details, when the proposed solution feels forced, or when you need to validate you are solving the right problem

Instead of improving appointment booking, what if we eliminated the need for appointments entirely?

Movement Thinking

Uses weak or incomplete ideas as stepping stones rather than judging them immediately

  • Extract value from "bad" ideas
  • Build momentum rather than killing concepts early
  • Transform fragments into workable solutions

When someone proposes an idea that feels wrong but interesting, when stuck between options, or when you need to keep ideation flowing

That idea would never work because it is too expensive - but what if cost was not a constraint?

Challenge

Questions why things are done a certain way, not because they are wrong, but to explore alternatives

  • Expose hidden assumptions in current services
  • Find what is taken for granted
  • Open up design space by questioning fundamentals

When services have been "this way" for years, when everyone accepts certain limitations, or when you suspect there is a better way no one has considered

Why do we require users to create an account? What if we did not?

Fractionation

Breaks services into smaller parts to find what can be changed, removed, or enhanced

  • See opportunities in service components others treat as fixed
  • Identify which parts truly matter to users
  • Find simplification opportunities

When services feel bloated, when trying to identify what to improve first, or when you need to understand which pieces actually create value

What if we removed every second step from this service journey?

Reversal

Inverts normal service logic to reveal hidden assumptions and new possibilities

  • Surface what you take for granted
  • Generate counter-intuitive service concepts
  • Find opportunities in doing the opposite

When conventional thinking dominates, when competitors all follow the same pattern, or when you want to differentiate radically

What if users paid us to make the service worse?

Dominant Idea Escape

Identifies and escapes the central assumption that constrains all thinking about the service

  • Find the invisible idea that shapes everything
  • See what cannot be seen because it seems obvious
  • Break through to genuinely transformative thinking

When all proposed solutions feel similar, when stuck in industry conventions, or when ready to fundamentally reconceive the service

What if this was not a service at all, but a product? Or a community? Or nothing?

Good service design tools don't just document reality—they change how we perceive it.

These tools are not neutral recording devices. They actively shape what we notice, what we prioritise, and what becomes thinkable. The choice of tool is itself a design decision—one that influences every decision that follows.