Hi vishal,
Please find the document as screenshot.
Logistics warehouse which has its Logistics Use maintained as Movable Storage. Logistics use Movable storage is used for pick scenario in service order processing.
This means that your stock is not in your warehouse , but with your service engineer for example in a service engineer van . Since such stock is not physically present in your site, ATP also does not take such stock into consideration.
Note : Under a site only one movable storage logistics area is allowed.
Regards
Leo