Glossary

Affective empathy

The capacity to feel what another person feels, more than to describe it. In design, affective empathy makes research land in the room, not just on the slide. Distinct from cognitive empathy (understanding) and performative empathy (demonstration). See §5.1.

AI Direction

The craft of governing AI as a design collaborator: structuring the input so the output lands usefully, recognising shallow competence versus genuine quality, and directing AI tooling at architectural scale. Named as a craft dimension rather than a tool, because tools change every few quarters while the judgement compounds. See §11.3.

Backstage

The systems, operations, and staff experience that enable a service but are invisible to the user. Design work that ignores backstage often creates friction for the people who must deliver it. See §4.4.

Branch, the › Chapter 9, T03

The career decision point at the Lead level where a practitioner chooses between continuing on the Individual Contributor track or stepping into management. Not a promotion. A lateral move between two distinct professional paths, each with its own H3 weight shift and development logic. The decision is based on observed energy patterns, free of aspiration or organisational pressure. Developed in Chapter 9. T03 (Branch Decision Card) is the working instrument.

Cognitive empathy

The capacity to understand another person’s perspective, to model their mental state without necessarily sharing their emotion. In design, cognitive empathy drives usability. Affective empathy drives meaning. See §5.1.

Conduct, the

The third layer of the H3 framework, anchored by Heart. The practitioner’s relationship with the people: the five domains of design leadership, focus and cadence, hiring, culture, and the ensemble. Covered in Part III (Chapters 12–16). Related terms: Model, Structure. See the Introduction (I.2).

Craft depth

In the π-shaped designer model, the first vertical: craft depth, built toward one end of the design spectrum, either upstream (strategy, framing, research) or downstream (production fidelity, systems). Developed first; it is the ground leadership depth stands on. See §7.3. Related terms: π-shaped designer, Horizontal bar, Leadership depth.

Design Strategist

The Staff IC archetype whose specialisation is the upstream end of the design spectrum. The Design Strategist’s craft is the work that happens before the artefact: brief interrogation, research strategy, problem framing, and the translation between user insight and business consequence. One of two archetypes the IC track produces at genuine Staff depth. The other is the Experience Engineer. See §10.2.

Downstream

Work that happens after a decision has been made: execution, production, delivery. Downstream designers optimise for quality within a defined direction. Contrast with upstream, where direction is still open. See §3.3 and §7.3.

Experience Engineer

The Staff IC archetype whose specialisation is the downstream end of the design spectrum. The Experience Engineer’s craft is production-level execution: motion calibrated to production fidelity, code-integrated interaction design, and design systems architecture at the token and governance level. One of two archetypes the IC track produces at genuine Staff depth. The other is the Design Strategist. See §10.3.

False Mastery

The condition of directing work one has not personally been able to do, most commonly when the leadership vertical is built on a craft vertical too thin to support it. False Mastery is usually not dishonest. It is the product of a career where Structure moved faster than Model. It becomes visible to the team before it becomes visible to the leader. See §6.4.

Five Domains, the

The five simultaneous responsibilities of design leadership: Vision (Head), Direction (Heart), Function (Head + Hand), Organisation (Heart), and Cooperation (Head + Heart). Held simultaneously, with none waiting its turn. Most leaders are strong in two and neglect the other three without noticing. See §12.1–12.6; T04.

Frontstage

The user-facing experience of a product or service, what customers see, touch, and interact with directly. Most design work begins frontstage. Mature design work connects frontstage to backstage. See §4.4.

H3

Hand, Head, Heart: the three modes of practice this book is built on, and the anchors of its three layers. Hand anchors the Model (Part I), Head anchors the Structure (Part II), Heart anchors the Conduct (Part III). All three modes are simultaneously primary. The weight shifts across a career. See the Introduction (I.2).

Hand

The making mode: the trained capacity to produce work with precision and intent, in visual, interaction, research, and writing craft. Hand anchors the Model layer (Part I). Necessary but not sufficient for the full career arc. See Part I.

Head

The systems mode: the trained capacity to read the field the work sits inside, framing problems, tracing downstream effects, and translating design reasoning into the language the organisation acts on. Head anchors the Structure layer (Part II). See Part II.

Heart

The empathy mode: understanding the human beings the work is for, accurately enough to design for them well. Cognitive empathy with evidence. Warmth alone is not it. Heart anchors the Conduct layer (Part III). See Part III.

Heart-access gap

The distance between a designer and direct contact with real users. Substitutes (personas, research decks, summaries) feel like Heart but are not. Named in §1.4; it sharpens at Senior (§8.2) and reappears at team scale in hiring (§14.1). See §1.4.

Horizontal bar

In the π-shaped designer model, the horizontal bar represents the breadth of a designer's competence across the discipline: the foundation of skills (visual craft, interaction design, research, and delivery) built at the Associate and Senior levels. The horizontal bar makes the verticals deployable. Without breadth, specialisation has no surface to build on. See §7.2. Related terms: π-shaped designer, Craft depth, Leadership depth.

IC track

Individual Contributor track: the career path for designers who advance through growing craft and strategic impact without taking on direct management responsibility. At its senior levels, the IC track requires more originality and less authority than the management track. See Chapter 8 and Chapter 9.

Leadership depth

In the π-shaped designer model, the second vertical: leadership depth, people leadership or thought leadership. Built after craft depth has compounded. Leadership depth not grounded in craft depth produces false Mastery. See §7.4. Related terms: π-shaped designer, Horizontal bar, Craft depth.

Learn-Do-Check

The three-part frame that closes sections asking the reader to change a specific practice. Learn points to the resources; Do sets out the practice; Check poses the diagnostic question. The frame is a map, meant to orient and not to prescribe. Foundational and integrative sections do not use it. Their argument is the artefact. See How to Use This Book.

Level

A descriptor of what the work requires of a designer at a given career stage, independent of rank or tenure. The book uses six levels: Associate, Senior, Lead, Staff, Principal, and a terminal tier (Advisor or Distinguished Designer on the IC track, Chief Design Officer on management). Levels describe vocabulary; value is a separate thing. See Chapter 8.

Management track

The career path for designers who advance by developing the capacity to direct other designers’ work, build team culture, and operate at organisational scale. The management track requires different primary skills than the IC track. It is not simply a continuation of the same work at greater volume. See Chapter 8 and Chapter 9.

Mastery

The H3 intersection at the centre of the triangle: all three modes held together and switched consciously in the same work. Situational reading and modal capacity in one practitioner, explicitly not the ‘triple threat’. The rarest state in design practice, the one most often claimed and least often achieved. Compare False Mastery. See §6.4; Appendix A.

Model, the

The first layer of the H3 framework, anchored by Hand. The practitioner’s relationship with the work itself: craft, judgement, and identity. The Model is carried as a career advances. Covered in Part I (Chapters 1–6). Related terms: Structure, Conduct. See the Introduction (I.2).

Performative empathy

The display of empathetic behaviour without its substance: nodding, noting, affirming, without genuine understanding or changed action. Performative empathy is the most common empathy failure in professional design practice. See §5.1.

Phases, the three

The three phases of design work introduced in Chapter 2: Problem Framing, Value Shaping, and Experience Realisation. All three are active in any real engagement. The practitioner moves through them, but the work sets the order. Cross-mapped against the three layers in T07 (Phase × Layer Map). See §2.1–2.4.

π-shaped designer

A designer with breadth across the discipline (the horizontal bar) and two verticals of depth: craft depth (built toward one end of the design spectrum) and leadership depth (people or thought). The profile this book argues replaces the T-shape under AI compression. Named for the shape of the letter π. See §7.1. Related terms: Horizontal bar, Craft depth, Leadership depth.

Plateau

The years spent between levels, where most of a career actually happens. The depth that makes the next level possible compounds here, and practitioners who rush it usually rebuild the foundation later under harder circumstances. Distinct from the craft plateau (§3.1), where practice has settled into what you can already do well. See §8.7.

Precision

The H3 intersection where Head meets Hand: the reasoning, standards, and infrastructure that make excellence repeatable, the part of the work that survives you. If the reasoning lives only in one practitioner’s head, the next designer cannot inherit the standard. See §6.3; Appendix A.

Presence

The H3 intersection where Hand meets Heart: craft calibrated so the user feels seen, execution that carries emotional intelligence, in language as much as in visuals. See §6.2; Appendix A.

Purpose

The H3 intersection where Heart meets Head: user truth and business consequence held in the same sentence, strategic empathy. At team scale it becomes the Vision domain (‘Vision is team-scale Purpose’, §12.1). See §6.1; Appendix A.

Saviour burnout

The exhaustion pattern of a designer who carries user pain the organisation has no mechanism to absorb. Genuine Heart produces knowledge the business is not ready to act on. Without a channel into decisions, the designer either carries it alone or stops gathering it. More empathy will not fix it. The fix is translation (§4.3) and the leader-built channels of §12.4. See §5.1.

Second Discipline

The domain a designer brings from outside design (engineering, psychology, marketing, film), actively maintained and developed as an asset rather than set aside as backstory. The Second Discipline is a source of analogical transfer and differentiated judgement. See §3.3.

Simultaneous-primary

The principle that all three H3 modes, Hand, Head, and Heart, remain active and primary simultaneously in the mature practitioner. The weighting shifts across archetypes and levels. The simultaneous activation does not. A mode is never switched off, only weighted differently. See §8.1.

Structure, the

The second layer of the H3 framework, anchored by Head. The practitioner’s relationship with the path: the π profile, the six levels, the Branch, the two specialisation archetypes, and the AI-era career. Covered in Part II (Chapters 7–11). Related terms: Model, Conduct. See the Introduction (I.2).

T-shaped designer

A designer with breadth across many disciplines and depth in one. The T-shape is a useful foundation at early career stages. The π-shape describes the more protective configuration at mid-to-senior levels. See §7.1.

Three-Star rubric

The domain-health rating in Movement 1 (Assess) of T04: each of the five domains rated against a single question, “Is this domain currently under-serving the team?” Built to catch chronic drag, which team loudness does not surface. See §13.1.

Two-year rule

The reversal heuristic for the Branch: if a track has felt consistently wrong for two years, that is signal, and the move back is a career move worth making. The rule filters temporary context (a bad project, a good manager) from durable misfit. See §9.5.

Upstream

Work that happens before a decision is made: problem framing, brief formation, opportunity identification. Upstream designers shape what gets built, going past how it is built. Contrast with downstream. See §3.3 and §7.3.

Weight shift

The gradual redistribution of a designer’s primary energy from one H3 mode to another across the career arc. The Hand does not diminish. The centre of gravity moves. Weight shift is natural. Refusing it is not. See §8.1.

Working literacy

Functional competence in a domain outside the designer’s primary discipline, enough to read the work, ask the right questions, and collaborate without translation overhead. Distinct from mastery; sufficient for partnership. See §7.2.