What are the advantages and disadvantages of SAP system in terms of inventory management?

Actually inventory management is a specific module exists in almost all ERP systems. and here in SAP its best from detailed managerial reporting point of view. Furthermore, In the SAP system each storage facility is part of an organizational structure created in the system. For inventory management there are two organizational levels which are required to be created; the plant, and the storage location. There are a number of goods movements in the SAP system, and they can be either inbound from suppliers or the production department, outbound to customers, a transfer of stock from another plants within the company, or an internal movements within the same plant.

But on the other side, you can only use inventory management on a value-only basis if you use SAP R/3 - Retail. 

sap is afamous prog but you have to make mesh layer in cad to solve ur slab

BUT         there are some programs better like

ROBOT , ETABS2013 , REVIT  , SAFE