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 One technique used by agile development teams is the idea of estimating product features using points. This has a few distinct advantages over estimating in physical units of time, e.g. hours or days:1. Estimating is very quick because it's an intuitive estimate of a feature's size. 2. An estimate in points indicates a feature's size relative to another, and does not give the illusion of being precise. 3. Over time, and using consistent iterations (e.g. 2-week sprints), you get a strong feel for how many points a team can deliver in an iteration. Even if a team is bad at estimating, as long as they're consistently bad, this makes a team's commitments self-correcting. Some agile teams use Fibonacci numbers to do this. Fibonacci numbers are a sequence where each number is the sum of the previous two, i.e:1, 2, 3, 5, 8, 13, 21 ... Using Fibonacci adds an element of science to the concept of estimating using points, adding the laws of distribution as a dimension. If you're interested in understanding more about the scientific background of Fibonacci numbers - which weren't invented for agile development by the way! - you might be interested to listen to this Radio 4 podcast on Fibonacci... See also: How to estimate your product backlog Read the full Story >>
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