Intro to Product Logic

Welcome! You can get started by exploring the articles below or dropping into my stream of latest writing. Everything here is a work in progress — please hit me up with your thoughts, questions, and critiques.



My side project, Double-Loop, is an app and Slack bot for recording the story of your build-measure learn loops.

While anyone can try it (click the above link), I’m looking specifically to test and craft Double-Loop with a small number of post product-market fit companies. If you’re interested, fill out this form.


Latest Writing

The Varieties of Product Management Tension. This post explores six types of tension that surround products. It serves as a guide to much of my writing over the last three years.


Forecasting, Hedgehogs & Foxes Series

The Fox-Hedgehog Collaboration Loop. A model for how the fox and hedgehog cognitive styles can be intertwined in the creative process.


screen-shot-2017-02-15-at-12-18-25-amThe Superforecasting Playbook for Product Development. A system for optimizing prediction accuracy in product thinking.


Product Tension Series

ProductDrivenThese posts wrestle with a tension at the heart of product development between “changing the world” and adapting to the world as it is.

1. The Fundamental Tension in Product

2. A Visual Framework for Product Vision 

3. The State of Your Company (Slideshow Template)

4. The Risk of a Scientific Creative Process

5. Lean & Fat Product Thinking

6.When the Tension Snaps in Silicon Valley


Product Triangle Series

The product triangle model distills the diverse range of product management activities through a visual framework.

1. The Product Management Triangle (also available in Japanese)

2. A Map of White Space for Product Managers

3. A Visual Vocabulary for Product Building

4. A System for Designing Startup Teams

5. A Map of Ways to Fuck Up a Product

6. The Startup Triangle


How others have applied the product triangle

Daniel Demetri: 3 Types of Product Management: Which One is Right For Your Company?

Péter Fenyó Fenyvesi: The Circle of Product Management


My writing with traction elsewhere

The Pros and Cons of Product Management [published on Forbes]

What Should A Startup Product Manager Focus On In The First 30, 60, And 90 Days? [Forbes]

A Map of Whitespace for Product Managers [Medium, referenced by Marty Cagan]

What does a great product manager at a tech startup do day-to-day? [Quora]

How do I become an effective product manager? [Quora]

The Product Management Triangle (A Graphical Model) [Quora]

What’s a product manager’s responsibility? [Quora]

What is product management? [Quora]

A Visual Vocabulary for Product Building [Quora]

What is the future of product management? [Quora]

Why has product management become such a popular role? [Quora]

How can product managers add value at an early stage company? [Quora]


Dan Schmidt's thoughts on building products.