“Before we buy this, does it duplicate what we have?”
The cheapest overlap to avoid is the one you never purchase. Check a proposed tool against the model at intake and you see whether it fills a real gap, repeats a capability you already run, or could be met by something already owned.
A capability already well covered (buy with caution), a genuine gap (a strong case), or an owned platform that could simply extend.
A procurement recommendation grounded in the portfolio, not the vendor's demo.
A department requests a new scheduling tool. The model shows the capability is already delivered by a module in a platform the institution owns. The purchase becomes a configuration, and a recurring cost never starts.