Final answer:
In Lean software development, the principle of "deliver fast" means that iterations are short, feedback is frequent, and product evolution is rapid. Rapidly creating working alternatives and developing a Minimum Viable Product (MVP) are also key aspects.
Step-by-step explanation:
In Lean software development, the principle of "deliver fast" means that iterations are short, so feedback is frequent, and product evolution is rapid. This allows working alternatives to be rapidly created and a simpler version of the software product, known as an MVP (Minimum Viable Product), to be developed first to reach the market rapidly.