Database
The Planner runs against an in-memory database, which your ERP system populates by entering data in corresponding SQL Server database fields.
The planer database resides in memory, providing real-time order promising capabilities. This structure provides increased efficiency and allows faster responses to disruptions in the plan. And because the database is memory-resident, most plan regenerations complete very quickly (depending on the size of your database).
After the Planner generates plan data, it transfers the output data back into the SQL tables.