Thanks everybody.

This solution will look something like ERP.

First a product was created which was specific to one industry (has its own hardware and software).

Now after couple of years, some major requirement has come to add different modules like

a. the users and managers of the system with payroll/time allocation etc (so HRMS).

b. the assets/devices/spares etc bought for the product (so Inventory)

c. The age of asset/services etc (so Asset management)

Like wise many more modules have been identified and each of these submodules should be pluggable (customers can decide which to buy with the main product)

One big team will be working on the project.

And as of now we have decided to use different DB for each module

Thanks a lot again.

Unni