“To Learn X what do I need to Measure? To Measure Y what do I need to Build? “
“The fundamental activity of a startup is to turn ideas into products, measure how customers respond, and then learn whether to pivot or persevere. All successful startup processes should be geared to accelerate that feedback loop.” – The Lean Startup principles
“You can’t just build things without talking to people. You can’t just keep talking to people without build anything.” – Alline Watkins
The Build-Measure-Learn loop is supposed to be followed since day one of a Lean Startup life. Not only when the team starts to write code, but also at the Customer Development phase.