Storytelling with Data (SWD) Skill

Apply the 6-lesson framework from Cole Nussbaumer Knaflic's Storytelling with Data methodology when creating, reviewing, or improving any data communication: charts, dashboards, infographics, slide decks, static sites, or written reports.

When to Use This Skill

• Creating: Building new visualisations, dashboards, infographics, presentations, or data-driven pages

• Reviewing: Critiquing existing data communications for clarity and impact

• Improving: Performing "makeovers" on charts, dashboards, or layouts to make them more effective

• Advising: Helping the user choose the right chart type, structure a narrative, or declutter

Format-agnostic by design: This skill covers what to communicate and how to design it. Pair it with format-specific skills or tools that handle the output mechanics (e.g. a pptx skill for slide decks, a web framework for interactive dashboards, an SVG/image tool for infographics).

The SWD 6-Lesson Framework

Every data communication task should be evaluated against these 6 lessons, applied in order:

Lesson 1: Understand the Context

Before touching any tool, answer three questions:

• WHO is your audience? What do they care about? What's their relationship to you? What will motivate them?

• WHAT do you need them to know or do? Define the single action or takeaway.

• HOW will you communicate? Live presentation? Email? Dashboard? This changes everything about design.

Key techniques:

• The 3-Minute Story: Can you explain your entire message in 3 minutes? If not, you haven't distilled it enough.

• The Big Idea: One sentence that articulates your unique point of view, what's at stake, and what you want the audience to do. Format: [situation] + [complication] → [recommended action].

• Storyboard first: Sketch your flow on sticky notes or paper before opening any tool. Rearrange freely.

• Exploratory ≠ Explanatory: The audience sees only the explanatory output - the curated insight, not the full analysis journey. Never dump exploratory analysis on your audience.

When reviewing existing work, ask:

• Is there a clear "so what?" on every chart, panel, or section?

• Could the audience state the key message after a 3-second glance?

• Is there a specific call to action?

Lesson 2: Choose an Appropriate Visual Display

Match the visual to the message. You can handle the vast majority of business communications with just a few chart types.

Read references/chart-selection.md for the detailed chart selection guide.

Quick decision framework:

• Comparison across categories → Horizontal bar chart (default workhorse)

• Trend over time → Line chart (continuous) or vertical bar chart (discrete periods)

• Part-to-whole → Stacked bar or waterfall (NOT pie charts)

• Two data points comparison → Slopegraph

• Single important number → Simple text (the number itself, large, with context)

• Detailed lookup → Table or heatmap

Charts to AVOID:

• Pie and doughnut charts (hard to compare areas/angles accurately)

• 3D anything (adds clutter, distorts data, makes reading values harder)

• Dual y-axes (confuse the audience about scale relationships)

• Spaghetti graphs (too many overlapping lines - filter or use small multiples instead)

Lesson 3: Eliminate Clutter

Clutter is any visual element that takes up space without adding understanding. Every element increases cognitive load - the mental effort to process information.

Identify and remove:

• Chart borders and unnecessary outlines

• Gridlines (reduce to light or remove entirely)

• Data markers on every point (only mark what matters)

• Redundant labels (if the axis says it, the data label doesn't need to)

• Bold/italic/colour on everything (when everything is emphasised, nothing is)

• Legends (can you label directly instead?)

• Rotated text (hard to read - restructure the chart instead)

• Decorative elements that don't encode data

Apply Gestalt Principles to structure what remains:

• Proximity: Group related items close together; separate unrelated ones

• Similarity: Use consistent colours/shapes for items in the same category

• Enclosure: Subtle backgrounds can group related content

• Closure: Remove unnecessary borders - the eye fills in gaps

• Continuity: Align elements so the eye flows naturally

• Connection: Lines connecting points imply sequence or relationship

Decluttering process (step by step):

• Remove chart borders

• Remove or lighten gridlines

• Remove data markers (unless specific points need emphasis)

• Clean up axis labels (round numbers, remove unnecessary precision)

• Label data directly (eliminate legends where possible)

• Use consistent, strategic colour

Lesson 4: Focus Your Audience's Attention

Use preattentive attributes - visual properties the brain processes before conscious thought - to guide the eye to what matters:

• Colour: The most powerful tool. Use a single accent colour to highlight the key data; push everything else to grey. Never use colour decoratively.

• Size: Larger elements draw attention first. Make the key number or data point bigger.

• Position: Items at the top-left get seen first (in left-to-right reading cultures). Place the most important information there.

• Bold/weight: Use sparingly on text to create hierarchy. Bold the key phrase, not the whole paragraph.

The Grey + One Colour rule: Default everything to grey, then use ONE strategic accent colour to highlight the story. This is the single most impactful SWD technique.

Memory matters:

• Iconic memory (~0.5 seconds): Preattentive attributes are processed here - that's why colour and size pop instantly

• Short-term memory (~4 items): Don't overload a single view with too many competing elements

• Long-term memory: Connect to what the audience already knows - use familiar chart types and conventions

Lesson 5: Think Like a Designer

Design serves the message. Apply these principles:

• Form follows function: Every element earns its place by serving comprehension

• Affordances: Make interactive elements look clickable; make important text look important

• Accessibility: Would this work in greyscale? For colour-blind audiences? Without a narrator explaining it?

• Aesthetics build trust: Clean, well-aligned visuals signal competence and credibility

Practical design rules:

• Use consistent alignment (create an invisible grid)

• Left-align text (easier to read than centred for body content)

• Use white space generously - it's not wasted space, it's breathing room

• Limit fonts to 1-2 families; use size and weight for hierarchy

• Action titles > descriptive titles: "Revenue grew 23% in Q3" beats "Q3 Revenue"

• Every chart, section, or panel should have a clear, declarative title that states the "so what"

• Add context with text annotations directly on the visualisation

Lesson 6: Tell a Story

Structure your communication as a narrative arc:

• Beginning (Setup/Plot): Establish the situation - what does the audience need to know as background? Build common ground.

• Middle (Conflict/Tension): This is the complication - the problem, the change, the unexpected finding. This is where data creates tension between "what we expected" and "what is actually happening."

• End (Resolution/Call to Action): The recommendation. What should the audience DO with this information?

Storytelling techniques:

• Repetition: Repeat your key message at least 3 times in different ways

• Sequential logic: Read just the section or chart titles in order - they should tell a complete story on their own. In a slide deck this is "horizontal logic" (reading slide titles across). In a dashboard or infographic, it's the reading order of panels or sections top-to-bottom.

• Self-contained units: Each individual section, panel, or slide should make sense on its own with its title + content ("vertical logic" in presentation terms).

• Match the medium: If presenting live, visuals should be sparse (you are the narrator). If the output will be consumed without a presenter (dashboards, emailed reports, embedded infographics), it needs more text, annotation, and self-explanatory context.

• Build/reveal progressively: Don't show everything at once. In presentations, build up the visual piece by piece. In interactive formats (dashboards, web pages), use progressive disclosure - overview first, detail on demand.

Applying SWD: Task-Specific Workflows

Creating New Data Communications

This workflow applies regardless of output format (slide deck, dashboard, infographic, static site, report).

• Context interview - Ask the user: Who's the audience? What's the one thing they should take away? What format/medium will this be consumed in?

• Storyboard - Draught section or panel titles as a narrative arc (beginning, tension, resolution). For presentations, these become slide titles. For dashboards, these become panel headings. For infographics, these become section headers.

• Chart selection - For each data point, pick the simplest effective chart (see references/chart-selection.md )

• Build - Apply Lessons 3-5 while creating each section or view

• Review - Check sequential logic (titles in order tell the story) and that each unit is self-contained

Format-Specific Considerations

Format Key adaptations

Slide deck Sparse visuals (presenter narrates), one idea per slide, progressive build/reveal

Dashboard Self-explanatory (no presenter), overview panels first with drill-down detail, interactive filters to reduce clutter

Infographic Single linear flow top-to-bottom, strong visual hierarchy to guide the eye, must stand alone without explanation

Static site / playground Progressive disclosure (summary up top, detail below or on click), responsive layout considerations, can use animation/interaction for reveal

Written report More annotation and explanation than visual formats, charts support the narrative text rather than replace it

Reviewing / Critiquing Existing Work

Run through the SWD Review Checklist in references/review-checklist.md . For each chart, panel, section, or slide, evaluate against all 6 lessons and provide specific, actionable feedback.

Chart / Visualisation Makeover

• Identify the core message (what should the audience think/do?)

• Choose a better chart type if needed (Lesson 2)

• Strip all clutter (Lesson 3)

• Apply grey + accent colour strategy (Lesson 4)

• Add a declarative action title (Lesson 5)

• Add text annotations to guide interpretation (Lesson 5)

• Show before/after to demonstrate the improvement

Reference Files

File When to read

references/chart-selection.md

When choosing a chart type or advising on visual selection

references/review-checklist.md

When reviewing or critiquing existing data communications

references/colour-and-emphasis.md

When making colour choices or applying emphasis strategies