The first step in rolling out any solution is to plan it properly. Planning out your network layout is one of the most important decisions you'll ever make in your organization. Even if as an administrator you're not responsible for the layout and just go along with what your network administrator provides, understanding this layout and being able to deploy your solutions to fit within it is also very important.
Planning an IP address scheme involves estimating how many devices will need to connect to your network and being able to support them. In addition, a good plan will account for potential growth and allow expansion as well. The main thing that factors into this is the size of your user base. Perhaps you're a small office with only a handful of people, or a large corporation with thousands of users and hundreds of virtual machines...