Grasshopper Herder is a startup and user experience blog by Tristan Kromer on lean startup methods, customer development, and recruiting co-founders.
HN links its Concierge vs. Wizard of Oz test post as a clear explanation of the two lean startup MVP methods.
I came here thinking I would see detailed Busines models. I might be biased as I'm working with the Business Model Canvas right now. If you're looking for a way to build your own here's a link: http://www.businessmodelgeneration.com/canvas
Edit: UX optimized BMC: http://grasshopperherder.com/business-model-canvas-for-user-experience/
There are two similar but different methods.
Concierge Test is used to understand the mechanics, not user demand.
Wizard of Oz (aka Mechanical Turk) is used to evaluate hypotheses.
The more detail in the post by Tristan Kromer below.
https://grasshopperherder.com/concierge-vs-wizard-of-oz-test/
Translation: Lean Startup Concierge/Wizard of Oz MVP. For anyone wanting to learn or refresh about that, here's a descent article I just Googled up (I reviewed a few and picked this one): https://grasshopperherder.com/concierge-vs-wizard-of-oz-test/