When the same company that diagnoses your business is also the one selling you the solution, there's a structural conflict of interest, even if no one acts in bad faith. It's worth understanding why separating these two phases improves the quality of the decision.
The invisible bias of the vendor-consultant
It's not that a provider lies about what your business needs. It's that when the diagnostic and the sale come from the same source, it's hard to separate "this is what your business needs" from "this is what we know how to sell."
What your company gains from an independent diagnostic
A diagnostic separated from implementation gives you a business case you can take to any provider, including, if you choose, the same firm that ran the diagnostic, but as an informed decision, not as the only path forward.
When it does make sense for it to be the same firm
When there's already a trusted relationship built on prior projects, and the goal is no longer deciding what to do but executing quickly. At that point, speed can outweigh independence, but that's a decision that should be made deliberately, not by default.
At EGREGIE, we explicitly separate the diagnostic from implementation: if you choose to implement with us, it's a distinct, explicit phase, never an implicit sale inside the diagnostic.