What is the difference between a system architect and a product manager or a project manager?

System architects mainly focus on the overall technical implementation scheme, focusing on the function and performance realization of the system. For example, how to transmit data, how to store data and how to read data. , data docking and division of labor between subsystems, data table structure field setting and so on.

The product manager focuses on user needs and product positioning, product planning, prototype design, user experience, system business model and so on.

The project manager is mainly responsible for the overall management of the time schedule, cost, product quality and demand range of the whole project.