Recommendation Algorithms

This is the day and age for recommendation algorithms. With such a diverse and seemingly infinitely large market, there is much room for a consultant that can tell you what you want. One really good example of a company that already uses a really well designed algorithm is Netflix. They effectively narrow down a list of thousands and thousands of movies and select a list of ten that you will most likely enjoy watching. It is actually quite scary, and by scary I mean correct, what solutions that they come up with. But why a list of ten? Wouldn't a perfect recommendation just be one thing, the thing you wanted to watch. One company, Stitch Fix, has done exactly this in the domain of apparel. This companies owner Eric Colson explains their business model in this video: