Many components are usually created within a Domain Engineering (DE) process. These components may exchange a great number of messages among them, and many times this interaction occurs within a specific group of components. The more messages the components exchange, the more complex the domain architecture becomes, thus compromising its understandability, maintainability and ultimately its reusability. This paper presents some elements of a components grouping technique that aims to identify and propose solutions to components coupling problems. This technique is being proposed within a domain engineering process called CBD-Arch-DE focused on component-based architectural design.