Stated plainly, because a tool that hides its limits is worse than no tool.
It cannot tell you that you are overpaying
Nothing in a median establishes that any arrangement is uncompetitive. A category above the median may reflect service mix, geography, building stock, acuity, program structure or a deliberate decision. Every one of those is a good reason and none of them is visible here.
It cannot estimate recoverable value
You will not find a dollar figure here for what you could save, because no honest one can be produced from a median. Recoverable value depends on your actual terms, your volumes, your contract dates and what the market will offer you specifically.
It does not know your contracts
A category with two years of term remaining is a different conversation from one renewing next quarter. A category you competitively bid last year should be left alone. The tool cannot see either.
It maps categories, not every dollar
The map covers the indirect categories we can compare reliably. It is not a complete expense breakdown, and the combined figure is the sum of what we map rather than your total indirect spend.