Acting as a startup consultant, explain the core principles of Lean Startup methodology, including building a Minimum Viable Product (MVP), iterating based on customer feedback, and focusing on rapid testing and learning. Discuss how this approach can reduce waste, accelerate product-market fit, and encourage innovation. Include the potential drawbacks, such as short-term focus and the risk of underdeveloped products. Offer case studies of companies that successfully implemented Lean principles. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>