Final answer:
Planning poker is used for estimating user stories in Agile development, whereas tasks required to complete those stories are typically estimated using hours or ideal days. Estimation techniques such as planning poker help to avoid biases and assist in making collective decisions about the effort required for product features.
Step-by-step explanation:
Planning poker is commonly used for estimating user stories, and hours or ideal days are used for estimating the tasks needed to complete a user story. When estimating the complexities involved in software development, different methodologies can be employed to ensure that both the broader scope of the work (user stories) and the individual efforts needed (tasks) are adequately assessed.
User stories are a tool in Agile methodologies that represent a feature or functionality desired by the user. Estimating the size of a user story can be done using various techniques, and planning poker, also known as Scrum poker, is a popular consensus-based estimation technique used in Agile development. This method assists teams in avoiding the influence of the anchor bias, where the first number spoken aloud sets a precedent for subsequent estimates.
After a user story has been estimated, it can be broken down into smaller, more manageable tasks. These tasks are then often estimated in terms of the amount of time they will take to complete, usually measured in hours or ideal days. This helps the team understand how long the user story will take to implement in total, as tasks accumulatively contribute to the completion of the story.