Double diamond approach

Discover → Kick-off discussion, SWOT review, competitor benchmarking, and user interviews.

Define → User personas, customer journey maps, and tree testing.

Develop → Brainstorming and "How Might We" questions.

Deliver → Usability testing and UX metrics.

The Double Diamond design approach

Discover

The process started with a competitor analysis of 10 streaming analytics platforms — looking at how each one structures dashboards, displays data, and guides users through insights.

Competitor Analysis

Next came a heuristic evaluation of StreamCharts and its competitors, based on Nielsen's usability heuristics. It flagged recurring issues with visibility of system status, recognition rather than recall, and aesthetic and minimalist design.

User interviews backed this up. Almost none of the competitors made it easy to compare platforms side by side — a clear gap StreamCharts could fill.

Define

Two core personas were built from the interview findings — Business Buyer and Streamer — and their workflows were mapped through Customer Journey Maps to pinpoint frustration points and decision moments.

One gap showed up for both personas: no easy way to compare platforms or performance metrics side by side. This mattered most for business users evaluating streamer partnerships. Streamers had a related problem: comparing platforms meant opening each one separately, sometimes ten or more, just to see basics like peak viewers, total streamers, and peak channels.

User Persona: BusinessCJMs: Business & Streamer

Tree testing with 83 users confirmed the navigation problem: people frequently got lost, took detours, and backtracked to find basic information.

Problem definition

Confusing navigation caused by a missing overview page
Without an "All Platforms" overview, users had no clear starting point. They landed on deep pages with no context, which made wayfinding worse.

No easy way to compare platforms
Business stakeholders needed to compare streaming services side by side. The product didn't support this, so they had to gather the data manually.

Overloaded graphs
Charts were visually dense and hard to read at a glance. Users said they had to "decode" the graphs instead of understanding the insights right away.

Develop

Before — Confusing navigation, no "All Platforms" overview.

After — Introduced a "Platform Overview" page, linked it in the top navigation and breadcrumbs, and set it as the default entry point for platform-related routes.


Before — No way to compare multiple streaming platforms.

After — Built a side-by-side comparison table that lets users evaluate up to three platforms at once, with standardized metrics and inline filters.


Before — Overloaded graphs

After — Cut visual noise by showing one metric per chart, moving secondary data to hover/details, and using a two-accent color palette for easier reading at a glance.


Responsiveness — The design was fully adapted for mobile: comparison tables became cards, and the layout worked without any horizontal scrolling.

Deliver

The redesign was validated with usability testing before and after the design changes: 18 moderated sessions and a 20-person unmoderated follow-up, across desktop and mobile, with a mix of returning and new participants. Participants worked through a set of representative tasks while task success, median time-on-task, first-click success, SUS, CSAT (1–5), and perceived ease (1–5) were measured.

Results improved across the board:

  • Task success: 64% → 91%

  • Median time-on-task: 2:40 → 1:32 (-43%)

  • First-click success: 52% → 85%

  • Perceived ease: 3.0 → 4.5/5

  • CSAT: 3.2 → 4.4/5

  • SUS: 60 → 82 (grade B)

A follow-up tree test after the navigation restructure separately showed a 35% improvement in navigation task success.

Outcome

This project was run as a consulting-style engagement, so the deliverable was a design proposal rather than a shipped feature. The stakeholder responded positively to the direction, and a few months later StreamCharts' internal team launched their own version of the Overview page.

Signs the work had real influence:

  • The Overview page is still live two years later.

  • The comparison tool is now a paid feature for Pro accounts.

  • The interface uses fewer colors than the original, though not as reduced as proposed.