How to balance user-led vs. user-centered design when it comes to navigation labels?

1. What is the correct UCD cycle?
2. What's the difference between system centered design and user-centered design?

What is the correct UCD cycle?

The four phases of user-centered design: Analysis, Implementation, Testing and Evaluation.

What's the difference between system centered design and user-centered design?

Interface design focus on the user rather than forcing the users to change their behavior to accommodate the product. System centered design focuses on organizing the functionality of the system and build the product in designer's own interpretation and implementation of systems thinking.