Final answer:
Among the options provided, 'planning poker' is a widely used technique for estimating effort-hours in Scrum teams. It is a consensus-based activity that encourages team discussion for more accurate estimations.
Step-by-step explanation:
Scrum team effort estimation is a vital part of agile project management. Among the methods listed in the question, planning poker is a popular consensus-based technique used for estimating effort-hours. Here's a quick overview of each method:
- Story point estimation - An abstract measure of effort required to implement a user story.
- Capacity range estimation - Estimation based on a team's historical performance and future capacity.
- Affinity estimation - Grouping stories into categories (usually by size) to simplify estimation.
- Planning poker - A game-like estimation technique where team members make estimates by playing numbered cards.
While each of these methods has its merits, planning poker in particular is widely recognized for promoting group discussion and providing a more accurate estimation as it combines the wisdom of the whole team.