Greenfield is the system used to look up metrics. Everyone can use it but most people dont really need to know. You can look at forecasts for sfs, backroom details, trailer unload details. What would be your reason for using it? Most team members dont need to use it and would just eat into your time to do your job anyway. If its about your individual metrics your team lead should be able to get them for you and should be doing so already anyways.