As a project manager of this project, the first thing that must be done is to layout each possible method. The next step is to do extensive, in-depth research of each method. This is an extremely important step because it can help avoid wasting time doing experiments that will end up failing. This was an issue our group had as well since midway our method ended up failing due to something that could have been caught from the start. We were very close to a solution but did not consider how inconvenient it would be for the sales rep and buyers, so we hard to start from the beginning. I would say you should choose the best possible method and have at least two backup methods incase the first method fails.