IIBA Agile Analysis Certification (AAC) Practice Test

The selection of story points for backlog items is essential for accurate estimation and planning in Agile methodologies. The correct answer emphasizes understanding the complexity of tasks, their size, and the inherent uncertainty involved in delivering them.

When considering complexity, it's important to recognize that this goes beyond just the physical dimensions or amount of work involved; it also reflects how difficult a task may be based on the technologies used, the processes involved, or the need for collaboration among various team members. Size refers to the scale of the task, which is a more tangible measure but still related to effort.

Uncertainty plays a crucial role as well—it encompasses the unknown factors or potential changes that can affect the project's course. The more uncertainty there is related to a backlog item, the higher the story points should be, as it signals a potential for additional work or rework.

In contrast, other options mention factors like known issues or impacts, which do not comprehensively cover the elements that should fundamentally drive the estimation process. While risks and dependencies are also important factors in project planning, they are subsumed under the broader concepts of complexity and uncertainty as articulated in the correct answer. Thus, focusing on complexity, size, and uncertainty provides a more holistic framework for effective estimation in Agile environments.