Bridgekeeper: “What is the velocity of an unladen swallow?”
King Arthur: “An African or European swallow?”
Bridgekeeper: “Huh? I don’t know that…”

- Monty Python and the Holy Grail

One of the most important metrics of an Agile team is its velocity. (No, you don't have to give the receptionist a stopwatch and do laps around your office.) In project management terms, velocity is the amount of work that a team can complete in a specified period of time.

Measurement is fundamental to any engineering discipline and the planning of a software creation work is no different. Whenever you plan to make or renew a piece of software the most important metric as the workload size. Measure of size is important because knowing the amount of work to do and the team skills (i.e. velocity) you can easily derive the work costs and duration. Agile software development methods do strive against the overplanning and overdetalization