Hi Sanjay,  The most important issue to consider is that SAP B1 is a single company solution which means that should you have other legal entities in your group you would need to install another instance of B1 or create the new company as a sales area which is not ideal…

Deltek is focused on Project Based Manufacturing and Projects organisations while project management is not SAP's strongest module, and not at the level of reach and depth of functionality that Deltek offers.  I am sure that many may decide to move from Deltek to SAP but…