Ask analysts overall revenue avenues of your clients/clients’ categories on best efforts basis. You can bifurcate your deliverables to your clients in terms of how much is enabling old revenue mix and how much is enabling new revenue mix

While writing ROI, its very likely that you missed out the topline impact on clients revenues due to their own shift in revenues and similar shift in clients's clients revenue sources which can be enabled by your offering.

Talk to our analyst to know what unknowns are impacting your clients and your client's clients and find unknown opportunities which can be enabled by your offerings proactively.