Hi @Mahesh_Krishnan , the Model Category plays a role in Asset creation not in CI creation. The CI needs to be explicitly created via workflows. The linking of Specifications and CMDB CI's is managed in the Install Base Item table. There is an OOTB action "Create Install Base Item and Installed Product" available with the OM App.

OMT-TNI integration use cases are for Design and Assign. But one does not need TNI to create CI records via OMT and/or to link it with Sold Product/Specs.