There are two levels of assessment that Platinum7 can provide, Initial and Detailed.
The Initial assessment is designed to be done in under a day and provide a deep analysis of your Salesforce org's security settings.
The Detailed assessment provides all of the information from an Initial assessment as well as a thorough assessment of your Salesforce deployment - from the technical aspects of the Salesforce org to the way in which it integrates with the rest of your environment as well as your policies and procedures.
All these inputs go to calculate a Maturity Score which can be used to benchmark between different Salesforce orgs in your business, other companies and also as a guide to your improvement over time.
The output of the detailed assessment is a document containing findings as well as recommendations on changes and an estimate on the time to remediate any issues.
Please read the datasheet for more information.