Logistics is a science, but it is also about common sense. Your supply chain is only as strong as its weakest link. When starting a complex supply chain project, you want to make sure to identify the potential weakest point as soon as possible, and check possibilities to overcome these weaknesses by implementing the simplest solution. Doing so will allow you to act quickly if something in your parameters change suddenly. This is only possible to accomplish if you have a solution that is flexible and expandable.