:root { --font-from: 18; --font-to: 18; --vw-from: calc(1920 / 100); --vw-to: calc(2400 / 100); --coefficient: calc((var(--font-to) - var(--font-from)) / (var(--vw-to) - var(--vw-from))); --base: calc((var(--font-from) - var(--vw-from) * var(--coefficient)) / 16); } html { font-size: calc(var(--base) * 1rem + var(--coefficient) * 1vw); } @media screen and (max-width: 1920px) { :root { --font-from: 16; --font-to: 18; --vw-from: calc(1440 / 100); --vw-to: calc(1920 / 100); } } @media screen and (max-width: 1440px) { :root { --font-from: 15; --font-to: 16; --vw-from: calc(1279 / 100); --vw-to: calc(1440 / 100); } } @media screen and (max-width: 1279px) { :root { --font-from: 14; --font-to: 16; --vw-from: calc(992 / 100); --vw-to: calc(1279 / 100); } } @media screen and (max-width: 992px) { :root { --font-from: 13; --font-to: 16; --vw-from: calc(479 / 100); --vw-to: calc(992 / 100); } } /* @media screen and (max-width: 479px) { :root { --font-from: 12; --font-to: 16; --vw-from: calc(1 / 100); --vw-to: calc(479 / 100); } }

Douglas Onsite Experimentation Team Embeds EchoLogyx QA to scale high quality experimentation

Overview

Douglas is a leading European beauty and cosmetics retailer with a strong online presence and a commitment to delivering exceptional digital experiences. Its Onsite Experimentation team runs a large number of A/B tests every year to continuously improve the online shop. To scale QA capacity for these experiments, the Onsite Experimentation team partnered with Echologyx and embedded dedicated QA expertise directly into its A/B testing workflow.

Objectives

Douglas' Onsite Experimentation Team engaged Echologyx with clear goals in mind
  • Provide dependable QA support that integrates seamlessly with their internal Onsite Experimentation team.
  • Maintain and improve testing quality across complex A/B Test launches
  • Speed up test delivery without compromising accuracy.
  • Increase confidence in test launches through detailed validation.

Challenges

Douglas runs a high-velocity experimentation program with around 150 A/B tests per year. The Onsite Experimentation team faced specific pressures:
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  • The team’s dedicated QA capacity for A/B tests was limited, which made it harder to quality-check every test variant thoroughly before launch.
  • The growing number of experiments required additional QA support to keep pace with the team’s test roadmap and short launch cycles.
  • The team needed a QA partner who could integrate closely with its experimentation workflow (Kameleoon setup, variant QA, cross-device checks) without adding overhead or slowing down test launches.

Approach & Process

Embedded QA Partnership:

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Echologyx integrated directly with Douglas’ Onsite Experimentation team, acting as an extension of their in-house A/B Test QA capability rather than an external vendor. This allowed for deep collaboration and shared ownership of quality outcomes.

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Clear Communication & Alignment:

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We prioritised structured communication,participating in daily standups, aligning on priorities, and ensuring progress was transparent across the whole Onsite Experimentation Team. This increased visibility into QA status and reduced uncertainty throughout test cycles.

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Responsive, High-Quality QA Execution of Experimentation Programme:

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Our QA engineers consistently identified issues across common and edge-case scenarios, validating changes meticulously so the Onsite Experimentation Team could launch tests with confidence. Rapid responsiveness, including support across time zones, kept momentum high even when priorities shifted.

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Proactive Ownership & Process Improvements:

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Beyond testing, Echologyx took ownership of Experimentation QA workflows, independently managing tasks, contributing to improvements of the team's QA process and helping streamline the A/B test delivery process.

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Results Achieved

  • The Douglas’ Onsite Experimentation team gained a trusted QA partner that felt like a natural part of the team.
  • The quality and reliability of A/B Test launches improved through consistent, detailed testing.
  • Faster A/B test launch cycles were achieved, thanks to flexible, responsiveness and proactive support.
  • Increased visibility into QA progress helped improve coordination and planning.

Douglas’ onsite experimentation team lead commented

“Working with Echologyx has been an incredibly positive experience. It genuinely feels like their team member is part of our own — not an external partner. Communication is always clear, structured, and proactive, and their responsiveness is outstanding, often making time zone differences virtually invisible. The quality of QA they deliver is consistently high, with impressive attention to detail, even in complex or edge-case scenarios. Their thoroughness gives us real confidence when tests are approved. They take ownership, contribute to improving our QA processes, and manage tasks independently and reliably. Since they joined, we’ve seen improvements not just in QA quality, but in team collaboration and overall transparency. Echologyx has brought a sense of stability and professionalism to our testing workflows, and we’re grateful to have them with us.”

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