Complexity points are units of measure, based on relative sizing, used to estimate development work in terms of complexity and/or size instead of traditional time-based methods that attempt to measure the duration of time required to complete some unit of work.

How are complexity points calculated?

In simple terms: you measure your Velocity over time. Using the above example, both developers have committed to 8 Story Points of Complexity. It’s a Complexity that the experienced developer estimated would take 6 Man Days to complete and the less experienced developer estimated would take 12 Man Days to complete.

What is complexity in user story?

Complexity is a factor in the number of points a product backlog item should be given. But it is not the only factor. The amount of work to be done is a factor. So, too, are risk and uncertainty. Taken together these represent the effort involved to develop the product backlog item.