What does an on-product index measure?

• A. Time spent on the product by the team.
• B. Time from product release to sunset.
• C. Time spent on code reviews.
• D. Time spent in meetings.

Answer: (B)

An on-product index measures the lifespan of a product in the market—from its release to its sunset. It tracks how long a product remains available and valuable to customers before it’s retired, guiding decisions about investments, maintenance, and end-of-life timing. The other activities you might track—how much time the team spends on the product, on code reviews, or in meetings—are internal effort metrics, not the market-facing lifecycle measure that the on-product index represents. So the time from release to sunset best captures what this index is about.