Nice. I never explicitly realized this but this is how I always succeeded in doing hard proof-of-concept projects in a complex software product. Single loop wh

Nice. I never explicitly realized this but this is how I always succeeded in doing hard proof-of-concept projects in a complex software product. Single loop when I know the domain fairly well. And double loop in a complete new domain. So, the question is: Are there other methods to approach problem-solving which gives positive success?