How is task evaluation performed within the Scrum methodology?

In Scrum, task estimation is usually performed by the team during sprint planning using methods such as:

• Planning Poker: team members use cards with numbers (usually Fibonacci numbers) to estimate the complexity or size of a task. After discussion, everyone shows their estimates simultaneously, then they discuss discrepancies and repeat the process until consensus.

• Story Points: estimating tasks in arbitrary units that reflect complexity, workload, and uncertainty, rather than time.

• T-shirt sizing: estimating in categories (S, M, L, XL), which simplifies understanding relative complexity.

Estimation helps the team plan the amount of work for the sprint and manage expectations. It is important that the estimation is collective and considers the experience of the entire team.