Design for Impact: Your Guide to Designing Effective Product Experiments book by Erin Weigel on a bookshelf. Propped up against the book is a die cut sticker that says, "Make things better—not just different"
Get a free sticker when you order a paperback copy of "Design for Impact."

Design for Impact

Your Guide to Designing Effective Product Experiments

Design for Impact features the Conversion Design process to help you and your team drive business growth. In it, Erin Weigel gives you practical tips and tools to design better experiments at scale. She does this with self-deprecating humor that will leave you smiling—if not laughing aloud.

The Good Experimental Design toolkit in the appendix presents everything you learn into step-by-step process for you to use each day.

Bonus! Get a FREE sticker when you order through this web shop.

 39,99 incl. VATAdd to cart

*This webshop serves EU customers only.

Opinion-based product design and development decisions are woefully ineffective.

“Design for Impact” gives you the science-backed tools you need to move beyond opinion and drive growth through experimentation. Packed with practical A/B testing advice and some hilariously instructive anecdotes, “Design for Impact” guides you through the entire Conversion Design process.

The Conversion Design process combines design, science, and business. Design by way of human-centered problem solving. Science by way of the scientific method. And business by way of value creation and transfer to stakeholders within the eco-system.

Conversion Design

A venn diagram showing that Conversion Design is where design, science, and business intersect.
Conversion Design combines design, business, and science.

Unlike other design processes, which are based on linear thinking, Conversion Design is based on systems thinking. Systems thinking, is a practice and set of tools that helps you understand and capture things in a dynamic and interconnected way. With it, you can represent and understand the world around you more accurately to make optimal decisions in the face of complexity. 

Systems Thinking

Linear thinking vs. systems thinking.
Linear thinking has clear, cause/effect relationships. Systems thinking captures complex relationships between things.

Conversion Design works much like a machine. Teams work together and lean on each other’s strengths at different points in the Conversion Design process by representing a wide range of disciplines. Everyone plays an important role to get through each step.

The Conversion Design Process

The conversion design process, which has seven interconnected steps and an output of knowledges.
The Conversion Design process, which works like a machine.

When teams go through each step, they have collected highly reliable evidence from a randomized controlled experiment.An A/B test is a common form of randomized controlled experiment. And it's the secret sauce to designing better products. “Design for Impact” walks you through how to design effective product experiments to create the knowledge you need to make optimal decisions. 

At the end of the process, you can utilize data and information collected from the whole hierarchy of evidence to make the best decision possible.

The Hierarchy of Evidence

A triangle where at the bottom is expert opinion. It is very available but not reliable. One step up is observational studies, which are less available but slightly more reliable. Another step up is randomized controlled tests, which are highly reliable but not very available. Finally, the small point at the top is a systematic review. It's only possible when you look and weight all available evidence, and it points to value, which is the goal.
The Hierarchy of Evidence shows the availability of types of evidence compared to their reliability.

As a bonus, “Design for Impact” gives you “The Good Experimental Design Toolkit.” With this toolkit you can immediately convert your new knowledge into impactful action.

The Good Experimental Design Toolkit

Templates and a checklist to structure your thoughts.

The Good Experimental Design Toolkit with four templates and a checklist.
The Good Experimental Design Toolkit by Erin Weigel.


Answers to common questions.

Have more questions?
Send me a message via my contact form.

Shopping Cart
Scroll to Top