Who usually creates the physical model of the system being defined?

The physical model of the system is typically created by the developers. This is because developers are responsible for translating the requirements and designs established during the analysis phase into a functional system. They use their technical expertise to design the actual database structure, user interfaces, and other elements that will make up the system, ensuring that it adheres to the specifications provided by business analysts and other stakeholders.

Developers utilize their understanding of programming, system architecture, and technology to create a comprehensive model that accurately represents the system's physical architecture. This includes detailing how data will be stored, processed, and accessed within the system, thereby ensuring efficient performance and functionality.

The other roles, while crucial in the development process, are not typically tasked with creating the physical model. The project manager oversees the project but does not involve themselves in the technical implementation. Business analysts focus on gathering and analyzing requirements from stakeholders, which informs the development process but does not include creating the physical model. Testers are engaged in validating the system's functionality and quality, focusing on identifying issues after the physical model has been established, rather than creating it.