When pursuing aggressive benchmarks, engineers must employ portfolio thinking, running multiple design projects simultaneously. But choosing winners requires a decisive way to eliminate projects that are not feasible to continue innovating, often referred to as a "project killer". 

In this episode, we analyze Tesla's battery development as a case study. We delve into their use of five clear-cut constraint categories that define failure conditions upfront: the Economic filter, Performance filter, Scalability filter, Resource filter, and System filter. 

We discuss the challenges engineers face in letting go of projects due to the sunk cost fallacy, where prior investments irrationally influence future choices, leading to the creation of "zombie projects". 

Learn why defining explicit kill criteria before development begins is a vital, often overlooked exercise that saves resources and ensures rational decision-making.

Blog for this episode: https://deeneyenterprises.com/qdd/podcast/define-kill-criteria-to-avoid-zombie-projects/

Episode with Dianna's review of Annie Duke's "Quit": Exploring Product Development and AI Through Literature: Insights from 'Loonshots', 'AI 2041', 'Quit', and "How Big Things Get Done' (QDD Book Cast) - Deeney Enterprises

Are your teams struggling with poor communication and rushed timelines? Is your product vision clouded by a lack of clarity? It's time to find your way through the confusion and build products that truly resonate with users.

Introducing "Pierce the Design Fog" by Dianna Deeney, the essential guide to turning abstract ideas into high-quality products. This book offers a proven playbook with practical frameworks and tools to help you foster team synergy, lead with vision, and ma

JOIN ME ON SUBSTACK Subscribe today.

We turn late-stage design surprises into a strategic plan by assigning explicit confidence levels, stacking evidence, and using the three-dial model of time, cost, and confidence boost. We show how to work backward from a system test to cheaper steps that drive faster, clearer decisions.

• applying the three dials of time, cost, confidence
• sequencing with the work-backwards strategy
• avoiding overtesting, undertesting, wrong testing
• turning confidence into a team communication tool
• practical next steps to build the confidence muscle

Subscribe to the Substack for monthly guides, templates, and Q&A where I help you apply these to your specific projects.

Visit qualityduringdesign.substack.com, or you can get the transcript of this episode and many other podcast episodes at deeneyenterprises.com

Are your teams struggling with poor communication and rushed timelines? Is your product vision clouded by a lack of clarity? It's time to find your way through the confusion and build products that truly resonate with users.

Introducing "Pierce the Design Fog" by Dianna Deeney, the essential guide to turning abstract ideas into high-quality products. This book offers a proven playbook with practical frameworks and tools to help you foster team synergy, lead with vision, and ma

JOIN ME ON SUBSTACK Subscribe today.

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

Are your teams struggling with poor communication and rushed timelines? Is your product vision clouded by a lack of clarity? It's time to find your way through the confusion and build products that truly resonate with users.

Introducing "Pierce the Design Fog" by Dianna Deeney, the essential guide to turning abstract ideas into high-quality products. This book offers a proven playbook with practical frameworks and tools to help you foster team synergy, lead with vision, and ma

JOIN ME ON SUBSTACK Subscribe today.

We break down why risk analyses often become checkbox theater and replace them with a simple, practical impact vs likelihood matrix that guides action. From quick wins to high-stakes unknowns, we show how to calibrate effort, buy the right learning, and move with confidence.

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

Are your teams struggling with poor communication and rushed timelines? Is your product vision clouded by a lack of clarity? It's time to find your way through the confusion and build products that truly resonate with users.

Introducing "Pierce the Design Fog" by Dianna Deeney, the essential guide to turning abstract ideas into high-quality products. This book offers a proven playbook with practical frameworks and tools to help you foster team synergy, lead with vision, and ma

JOIN ME ON SUBSTACK Subscribe today.

If you reach for the nearest “risk” template, it might cause more problems.

There are two very different jobs we ask risk tools to do. In this episode, we talk about how to pick the one that actually moves your project forward.

• identification tools for unknown unknowns (like FMEA and preliminary hazard analysis) that systematically surface risks to users, systems, and environments
• decision tools for known unknowns that clarify impact, likelihood, and uncertainty so teams can choose a path with confidence. 

Along the way, we call out organizational risks—supplier failure, regulation shifts, competitor timing—that belong in resilience planning, not product FMEAs.

Are your teams struggling with poor communication and rushed timelines? Is your product vision clouded by a lack of clarity? It's time to find your way through the confusion and build products that truly resonate with users.

Introducing "Pierce the Design Fog" by Dianna Deeney, the essential guide to turning abstract ideas into high-quality products. This book offers a proven playbook with practical frameworks and tools to help you foster team synergy, lead with vision, and ma

JOIN ME ON SUBSTACK Subscribe today.

Big changes, clearer focus, and more ways to learn together. We’re tightening our cadence to two episodes a month and building monthly themes that travel across the podcast, blog, and a new Substack home—so you can go beyond ideas and into practice with tools, Q&A, and live community sessions.

Here’s what’s new and why it matters. The podcast keeps its familiar format, but now each month has a focused theme that carries into Substack deep dives. Subscribers get comprehensive guides, open Q&A weeks where we answer your specific questions in the comments, and a one-hour live chat each month to pressure-test methods on real scenarios. It’s a smarter learning loop: listen, explore, apply—then come back with better questions. You’ll also get access to the strategy vault filled with templates, worksheets, and facilitation guides.

We’re also thrilled to announce the launch of Pierce the Design Fog, a practical playbook for product, engineering, and UX teams who need structure without losing speed or humanity. With models like the concept space and ADEPT framework, you’ll align cross-functional teams, turn insights into actionable design inputs, and make confident calls under uncertainty. There’s a companion card deck—Concept Quest: Design Discovery—that acts like a portable facilitator, with prompts and instructions to guide workshops. Pre-order before October 14, 2025, to enter the card deck giveaway and bring these methods straight into your team’s next session.

Subscribe to the show, check out the Substack at qualityduringdesign.substack.com, and leave a review to help more builders find us.

Are your teams struggling with poor communication and rushed timelines? Is your product vision clouded by a lack of clarity? It's time to find your way through the confusion and build products that truly resonate with users.

Introducing "Pierce the Design Fog" by Dianna Deeney, the essential guide to turning abstract ideas into high-quality products. This book offers a proven playbook with practical frameworks and tools to help you foster team synergy, lead with vision, and ma

JOIN ME ON SUBSTACK Subscribe today.

How do you balance customer wants with project constraints? If your customer-facing teammates are saying our customers want this, that and the other thing, which ones do we prioritize over others?

Not all features are equal in the eyes of our customers. And not all features are value-added, either.

In this episode, we delve into how to prioritize customer wants using the powerful Kano Model, a tool that maps customer satisfaction against the implementation of product features.

You'll learn how to differentiate between essential and non-essential features, ensuring that your design truly resonates with your customers. This episode walks through the intricacies of the Kano Model's two-by-two matrix and the different satisfaction levels represented by various lines and curves.

Too complex? We break it down. Prioritize your features based on their impact to the customer using their voice. Then, consider how well you want to implement that in your design using the Kano Model.

Get ready for practical tips and proven strategies to enhance your product’s value while managing cost, time, and design trade-offs. This episode is an introduction to the Kano Model for design.

Visit the podcast blog for a Kano Model and examples to help you put it into practice.

JOIN ME ON SUBSTACK Subscribe today.

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.

Every product designer knows that critical moment when you must shift from understanding customer needs to actually engineering solutions. It's where the magic happens—and where many projects stumble.

After a week of concept development with your team (customer evaluations, benefit analysis, symptom ID, and process mapping), you've gathered valuable insights. But how do you transform this mountain of information into concrete technical requirements? 

Quality tools transform the concept-to-design transition from a jarring handoff to a smooth, continuous conversation with your cross-functional team. In translating concept development ideas into design inputs, you'll create products that truly solve problems and delight users—with less rework and fewer costly changes later in development. 

Ready to bridge the gap in your next design project? Visit the podcast blog and links to other episodes.

JOIN ME ON SUBSTACK Subscribe today.

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.

This episode explores the critical importance of evaluating the customer's use process during concept development. 

Rather than focusing solely on what your product does, understanding how users will interact with it creates opportunities to design more intuitive, enjoyable experiences. By mapping out the steps users take from beginning to end using process flowcharts, development teams gain clarity on inputs, outputs, and the journey between them.

Quality engineers have long used flowchart analysis tools to improve manufacturing processes, and these same techniques provide tremendous value in product design. 

Whether you need to simplify complex steps, compare competitor approaches, or identify critical-to-quality elements, these analytical methods help prioritize design decisions based on what truly matters to users. 

The goal is creating products that feel intuitive and natural, preventing those awkward validation testing moments when engineers want to shout, "You're doing it wrong!" When we evaluate the use process early, we develop products others love while minimizing costly redesigns and user frustration.

Subscribe to Quality During Design and sign up for our newsletter at newsletter.deeneyenterprises.com to learn more about applying quality thinking to your product development process. Your users will thank you for it!

View the podcast blog.

JOIN ME ON SUBSTACK Subscribe today.

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.

What happens when cutting-edge AI meets manufacturing quality control? The results are nothing short of revolutionary.

Keven Wang, co-founder and CEO of UnitX, takes us through the world of AI-powered visual inspection, where it is transforming how factories detect defects and improve product quality. Drawing from his experience with over 160 manufacturers worldwide, Keven reveals how these systems consistently outperform both human inspectors and traditional rule-based vision systems, reducing escape rates by up to 10x while cutting scrap rates by approximately 50%.

We talk beyond basic implementation to explore Kevin's four-step roadmap for AI-powered manufacturing. Starting with end-of-line inspection, manufacturers progress to upstream checkpoints, then leverage collected data for powerful insights, ultimately working toward the "self-driving factory" where AI automatically implements process corrections. Keven shares a compelling success story of a motor manufacturer that reduced customer complaints by 90% and improved yield from 85% to 90% after adopting this technology across 90 production lines.

Perhaps most surprising is Keven's observation that the greatest challenge in AI adoption isn't technical but human: aligning teams, establishing shared goals, and helping personnel become comfortable with the technology. This insight underscores that successful implementation requires thoughtful change management alongside technical expertise.

Whether you're a design engineer, manufacturing engineer, quality professional, or technology leader, this episode provides both practical guidance for getting started with AI inspection and an inspiring vision of where these technologies are heading. Ready to explore how AI could transform quality in your production environment? This conversation is your perfect starting point.

Visit the UnitX website.

Visit the podcast blog for more. 

JOIN ME ON SUBSTACK Subscribe today.

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.