Estimating Effort for Product Backlog Items

In Scrum, estimating the effort for Product Backlog items is a crucial aspect of effective planning and forecasting.

Exam Question

The Product Owner manages the Product Backlog. Who is accountable for estimating the effort to complete the Product Backlog items?
(choose the best answer)

• A. The Developers. As a collective, they have a complete view of the work needed to transform Product Backlog items into Increments of product.
• B. The PMO. They have all the history on projects delivered, and this enables the IT department to make delivery commitments.
• C. The Product Owner. The Product Owner is required to commit on delivery to the users and the stakeholders.

Correct Answer

A. The Developers. As a collective, they have a complete view of the work needed to transform Product Backlog items into Increments of product.

Explanation

Why A is Correct

• Understanding of the Work: The Developers, being the ones who actually perform the work, are best positioned to understand what is required to complete the Product Backlog items.
• Expertise in Estimation: The Developers have the necessary technical expertise to provide estimates.
• Collaboration: Estimation is a collaborative activity in Scrum, leveraging the collective knowledge and skills of the Developers to ensure that all aspects of the work are considered.

Why B and C are Incorrect

• B. The PMO:
  • While the PMO may have historical data, they do not have the current, detailed understanding of the work involved in each specific Product Backlog item.
• C. The Product Owner:
  • The Product Owner is responsible for ordering the Product Backlog and maximizing value but relies on the Developers for estimates of effort. The Product Owner typically lacks the technical expertise to estimate the work accurately.

Responsibilities in Scrum

• Product Owner: Manages the Product Backlog, orders the items to maximize value, and ensures transparency and understanding of the backlog items.
• Scrum Master: Facilitates the Scrum process, ensures Scrum practices are followed, and helps remove impediments to the Developers’ progress.
• Developers: Estimate the effort needed for Product Backlog items, create a forecast for each Sprint, and work collaboratively to deliver Increments that meet the Definition of Done.

Relevance to the PSPO I Exam

Understanding who is responsible for estimating effort in Scrum is crucial for the PSPO I exam. This knowledge emphasizes the importance of collaboration and the role of the Developers in planning and forecasting work.

Key Takeaways

• Estimation Responsibility: Developers are accountable for estimating the effort to complete Product Backlog items.
• Collaboration: Estimation is a collaborative activity that leverages the collective expertise of the Developers.
• Effective Forecasting: Estimates provided by the Developers help in effective Sprint Planning and delivering valuable Increments.

Conclusion

In Scrum, the responsibility for estimating the effort required for Product Backlog items lies with the Developers. Their collective expertise ensures that estimates are based on a thorough understanding of the work required to deliver valuable Increments.

For comprehensive preparation and practice exams, check out PSPO I Exam Prep to enhance your understanding and application of Scrum principles.