Late-stage design just hit a snag—now comes the moment that separates guesswork from great engineering. We walk through a clear, repeatable method to investigate unexpected failures and make high-impact decisions with confidence. Instead of hunting for a perfect test, we set a confidence target and stack multiple forms of imperfect evidence until we close the gap.

If you’re navigating late-stage product development and want a calm, methodical way to move from 40% to 90% confidence, this framework will help you choose the next best step, allocate limited time and budget, and know when to stop. 

Join the Substack for monthly guides, templates, and QA where I help you apply these to your specific projects. Visit qualityduringdesign.substack.com. 

Show notes

Ready to apply this to your project?
→ Schedule a free discovery call: Dianna's calendar

Want insights like this?
→ Subscribe to my newsletter: qualityduringdesign.substack.com

Learn the full framework:
→ Get the Book: Pierce the Design Fog

ABOUT DIANNA
Dianna Deeney is a quality advocate for product development with over 25 years of experience in manufacturing. She is president of Deeney Enterprises, LLC, which helps organizations and people improve engineering design.