SAP AIO methodology is SAP best practices for data migration. We call it BPDM. The current AIO version is 1.4 which readily provides Jobs (Example: Material Master, Customer, Vendor etc.) to extract, transform and load the data into SAP using IDOCs. BPDM covers all standard SAP fields which could be used for migration. AIO Jobs need to be installed on your machine to access to it which setups the Jobs with multiple repositories. Certain Jobs need to be executed before you start using these AIO Jobs which basically configures various lookup tables for pre-validation and post validation. Unfortunately, AIO does not covers all the SAP Objects but it is good to use which saves around 40% of the development efforts as per my experience and it is easy to maintain.
Regards,
Ansari MS