Felix Lenhard
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Tag: Lean Startup

4 articles

frameworks

The 5-Conversation Sprint for Idea Validation

Validate any business idea in one week with five structured conversations. A fast, cheap framework that prevents building the wrong thing.

Jan 14, 2026

build

The Build-Measure-Learn Loop in Practice

The theory is everywhere. Here's what it actually looks like day to day.

Dec 23, 2024

validate

The Five-Dollar Validation Framework

You can validate almost any business idea for less than five dollars. Here's the framework that strips validation to its absolute minimum cost.

Nov 19, 2024

validate

Testing Business Ideas Without Spending a Cent

You don't need money to validate a business idea. Here are the exact methods I use to test concepts before investing anything.

Sep 30, 2024
Felix Lenhard

AI-Native Business Builder. Author. Keynote Speaker.

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