In Simulink®, you can create models that are based on a modular design platform that comprises a fixed common structure with a finite set of variable components. The variability helps you develop a single, fixed master design with variable components.
The approach helps you meet diverse customer requirements that are governed by application, cost, or operational considerations.
Variants are the variable components of modular design platforms. They help you specify multiple implementations of a model in a single, unified block diagram. For more information, see What Are Variants and When to Use Them.