In making my starting entry on our Lean Software Development blog, I considered - "what should I blog about?" I figured, maybe a discussion about why I liked Lean so much might be appropriate.My beginnings with Lean actually go back to the 80s when I studied Edwards Deming. I found some of his ideas somewhat counter-intuitive then. However, the validity of his work had already been established in Japan. I have learned that when my models do not reflect reality, I have to change my models.