The major finding from Fig. is that we found no significant correlation between how complex a product is and the time it takes to prototype was found. This is a surprising result as intuition would suggest that a more complex product would take longer to prototype. The only visible trend is possibly even more counterintuitive: prototyping time decreases with the number of functions the product performs. The cause of this trend is unclear. We speculate that it could be due to several things; one is that for products the interviewee conceived of as simpler, there is a tendency to enumerate more non-essential functions, whereas for complex products, the interviewee focused on the one or two main functions. It could be that of feature creep or overengineering occur more frequently in simpler products during development. Overengineering describes the process of designing a product to be overly complex, having more features or greater robustness than is necessary for its functions, which leads to inefficiencies. Feature creep is the expansion of product requirements during prototyping by adding features beyond the original scope of the product .To validate this trend a more rigorous definition of essential functions vs. other functions would be needed.