Modular subsystems in a wheelhouse technology may or may not be a staple in your industry. There are some industries where they are not a standard practice and there are industries where without them, you can’t be a competitor. Of course there is everything in-between.
First let’s define what a modular subsystem is for this discussion. A modular subsystem is an assembly that is designed to be integratable into multiple products. For the automotive industry this could be a transmission. Each car model a manufacturer makes does not have a unique transmission design. There may be six transmission types that cover 20 car models.