Uploaded documents and data produce a higher-confidence score. Answers backed only by attestation are capped at maturity level 2, which converts to 5.0. Documented evidence lets an indicator score above that cap.
When documents or data are missing for a domain, an attestation questionnaire is presented to fill the gaps so every indicator can still be scored.
The more of the plan record you upload, the more of the true picture of your plan the score will represent.