Blocking storage locations from MRP can be useful e.g. if you wish to exclude inventory in showrooms from procurement decisions.
To block storage locations from MRP you can go to to IMG > Production >Material Requirement Planning > Planning > Define Storage Location MRP per Plant. In the plant/storage location overview set indicator ‘1’ behind the location you wish to exclude from MRP.
This is a very simple configuration. However if you overlook this you may run the risk of implementing MRP areas for the same purpose, but with a lot more effort and impact.