Deliver working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale.– Agile Principles
A short feedback cycle is incredibly valuable. A short feedback cycle helps ensure you’re building the correct thing. A short feedback cycle helps you decide if you should keep going. A short feedback cycle helps you know if you should stop.
Product vs. Project
Shift your mindset from working on a project to working on a product. Products don’t have end dates, they continue to exist and the organization realizes their benefits over and with time. As time goes on, incrementally release working features for the product so that you can harness the power of short feedback cycles.