We find that companies using highly structured processes for prototyping had an average of 31 weeks per prototype including the downtime before the next prototype. Using the average of six weeks downtime, this was 25 weeks per prototype. Companies using natural processes averaged 19 weeks for prototyping time plus downtime, or 13 weeks prototyping time, about half the time of structured processes. Hybrid companies were at 28 weeks prototyping time plus downtime. This result points to natural processes being the better choice if prototyping quickly is the only goal. Several excerpts from the interviews back up this finding, including: