Designing interactions and UI for synchronous action with long processing time [duplicate]

1. What are the 3 most important steps in the process to achieving the best UI user experience?
2. What is the interaction design in UI design?
3. What are the golden rules of UI design?

What are the 3 most important steps in the process to achieving the best UI user experience?

The research process may be divided into three main stages: studying problem space, interviewing a client, and analyzing competitors' activities. The key to the project's success is the involvement of all developers and product owners from the very beginning of the process.

What is the interaction design in UI design?

Interaction Design (IxD) is the design of interactive products and services in which a designer's focus goes beyond the item in development to include the way users will interact with it. Thus, close scrutiny of users' needs, limitations and contexts, etc.

What are the golden rules of UI design?

The UI design principals are:

Place users in control of the interface. Make it comfortable to interact with a product. Reduce cognitive load. Make user interfaces consistent.