Software Deployment

I don't think you can. You can create sub-features but no sub-components.

I don't see how it would work for a number of reasons, i.e,  keypaths, GUIDS, shared components (referencing, etc) Also as all files in a given component must go to the same directory, a file going to a sub directory must go into a separate component so if that is your original thinking im afraid not

Component is the basic unit of an MSI .The componenet is like a building block we cannot have anything as a sub building block hence no concept of sub component is possible.

Not possible as there is no ‘parent’ field in the Component table (as there is in the Feature table). A component  is linked to its ‘parent’ via the FeatureComponents table so can only have a Feature as its ‘parent’.

NO, Only features have sub feature.