What stages of the product development lifecycle do you know?

The product development lifecycle typically includes the following stages:

1. Initiation and requirements analysis — gathering and analyzing user and business needs.
2. Design — creating the architecture and design of the product.
3. Development — coding and implementing functionality.
4. Testing — checking the product for errors and compliance with requirements.
5. Deployment — deploying the product in the operational environment.
6. Support and maintenance — fixing errors, updates, and improvements.

In different methodologies (Waterfall, Agile, Scrum), these stages may have their own features and iterative nature.