Automate Inventory Management System Testing

Develop automated test case to test the workflow of an inventory & material management system. The system is a webapplication.

The Test Scenario as a summary is
A Property has a warehouse where spare part inventory is stored. Maintenance requests consume the inventory in the Property warehouse.
A material request scans the warehouse for spare parts which are under the reorder level and prepares the list of spare parts and the min qty that needs to be ordered.
The ordering process is outside the system. The spare parts once received are updated in the central warehouse inventory.
The material fulfillment team then updates the Material Request list with the received materials. The inventory in the central warehouse is reduced. When the spare parts in the Material request list is delivered at the warehouse in the property the inventory there is increased.

Different scenarios have to be chalked out, data created and automated test script created to run the test cases.