Scrum PSM-III 問題集

質問 1：
A fellow Scrum Master asks for your input. His team members see no value in defining a Sprint goal and he has trouble explaining its use to them. What would you tell this Scrum Master?
正解：
If team members see no value in defining a Sprint Goal, this indicates a fundamental misunderstanding of Scrum. As a Scrum Master, I would explain to my fellow Scrum Master that theSprint Goal is a core element of Scrumand is essential for alignment, commitment, and empiricism.
First, the Sprint Goal explainswhy the Scrum Team is doing the work in the Sprint. According to the Scrum Guide, the Sprint Goal is the single objective for the Sprint and provides coherence to the Sprint Backlog. Without a clear "why," Sprint work becomes a collection of unrelated tasks rather than a purposeful effort to deliver value. The Sprint Goal helps the team understand the intent behind the selected Product Backlog Items and aligns daily decisions with that intent.
Second, the Sprint Goal represents acommitment by the Scrum Team. The team commits to doing everything in its power to achieve the Sprint Goal, even though the specific scope may evolve. This commitment fosters focus and shared accountability. Instead of optimizing for individual tasks, the team optimizes for achieving the Sprint Goal as a whole.
Third, the Sprint Goal actuallycreates flexibility rather than restricting it. When new discoveries, risks, or opportunities emerge during the Sprint, the team can adapt the Sprint Backlog as long as those changes do not endanger the Sprint Goal. This allows the team to respond to change while maintaining stability of purpose.
Without a Sprint Goal, change becomes arbitrary and increases the risk of losing focus.
Fourth, the Sprint Goal enables effectiveinspection and adaptation. During the Daily Scrum, the team inspects progress toward the Sprint Goal and adapts their plan accordingly. Similarly, at the Sprint Review, stakeholders can inspect whether the Sprint Goal was met. Without a Sprint Goal, there is no meaningful benchmark for inspection.
Finally, it is important to be clear thatwithout a Sprint Goal, Scrum is not being practiced as intended.
The Sprint Goal is a required element of Scrum, and removing it undermines transparency and weakens the empirical foundation of the framework.

質問 2：
Someone from the HR department approaches you. They regret to inform you that the Product Owner for your team isabsent starting today and will be unavailable for the rest of this sprint. The Product Owner might be back at work somewhereduring the next sprint, but it's all unknown at this point. What should the Scrum team do?
正解：
When the Product Owner becomes unexpectedly unavailable, the Scrum Team must respond in a way that preservescontinuity, transparency, and value delivery, while respecting Scrum accountabilities.
Short-Term Response
In theshort term, covering the current Sprint and possibly the next Sprint, the Scrum Team should be able to continueworking. Scrum is designed to be resilient to short-term disruptions. The team can proceed by relying on:
* TheProduct Visionpreviously communicated by the Product Owner,
* Thecurrent state and ordering of the Product Backlog, which should already reflect the Product Owner's value decisions.
During this period, the Developers continue to work toward the Sprint Goal, and the Scrum Master ensures that Scrum events take place and remain productive. No one should assume the Product Owner role informally, as this would undermine accountability.
Longer-Term Impact
If the Product Owner's absence extends beyond a short period, it becomes animpedimentto the Scrum Team.
The Product Owner is accountable for maximizing product value and managing the Product Backlog.
Prolonged absence prevents effective backlog ordering, stakeholder collaboration, and value-based decision- making.
In this case, theScrum Master must make the impediment visible to the organization. This includes explaining the impact on value delivery and helping leadership understand the need for a clear Product Owner accountability. The organization should thenappoint a new Product Ownerto ensure continuity of decision- making and accountability.

質問 3：
How the organization discusses and plans the work of creating software will be reflected in the implementation of that software.
Technical systems can be decomposed to composite elements, from the large to the small. Basic components may be represented as activities, workflows, functions, features, capabilities, and other similar nomenclature.
How does this system decomposition affect Scrum Teams on scaled projects?
正解：
How an organization discusses, plans, and decomposes work is inevitably reflected in the software it produces. When technical systems are decomposed into elements such as activities, workflows, functions, features, or components, these decomposition choices have adirect and systemic impact on Scrum Teams, especially inscaled Scrum environments.
1. Decomposition Influences Team Structure (Conway's Law)
In scaled projects, system decomposition often drives how teams are formed. When work is decomposed along technical components or functions, organizations tend to createspecialist or component teams(e.g., front- end teams, back-end teams). This results in:
* Increaseddependencies between teams,
* More handoffs and coordination,
* Reduced autonomy of individual teams.
Scrum, however, expects teams to becross-functionaland capable of delivering usable Increments independently. Component-based decomposition therefore hinders effective Scrum adoption at scale.
2. Effect on Value Delivery and Transparency
Scrum relies on frequent inspection ofintegrated, working product Increments. When decomposition focuses on small technical parts rather thanend-to-end features or capabilities, teams may deliver partial outputs instead of usable value.
This negatively affects:
* Transparency, as progress is reported through intermediate artifacts rather than working software,
* Inspection, since stakeholders cannot meaningfully evaluate value,
* Adaptation, because feedback is delayed until integration occurs.
In scaled Scrum, this often results in "almost done" work that is not truly Done.
3. Feature-Oriented Decomposition Supports Scrum
Scrum scales more effectively when system decomposition emphasizesvertical slices of value, such as features or capabilities, rather than horizontal technical layers. Feature-oriented decomposition enables:
* Cross-functional teams,
* Reduced dependencies,
* Faster feedback cycles,
* Independent delivery of value by each team.
This approach aligns with Scrum's expectation that every Sprint produces ausable Increment.
4. Impact on Integration and Risk
Decomposition decisions strongly affectintegration frequency. Poor decomposition increases integration complexity and encourages late integration, which raises risk and reduces learning.
In Scrum-especially at scale-integration must happen early and often. Unintegrated work is not considered Done, and delayed integration undermines empiricism by hiding real system behavior until late in development.
5. Learning and System Optimization
When Scrum Teams work on complete features rather than isolated components, they gain broader insight into:
* Customer needs,
* System-wide trade-offs,
* End-to-end product behavior.
This shared understanding improves decision-making and supportscontinuous improvement at the system level, rather than local optimization within silos.

質問 4：
You are a Scrum Master working with a Scrum Team. The Development Team constantly complain that requirements are not clear enough. The Product Owner claims she is too busy to provide extra clarity. What should you do?
正解：
This situation represents a breakdown inProduct Backlog transparency and collaboration, which directly threatens empiricism and value delivery. As a Scrum Master, my responsibility is not to solve the problem myself, but toenable the Scrum Team and the organization to resolve it.
1. Reframe the Problem: Requirements vs. Product Backlog
First, I would help both parties reframe the issue. In Scrum, we do not work with "requirements" in a traditional, fixed sense. Instead, we work with aProduct Backlog that is emergent, ordered, and continuously refined. Lack of clarity in Product Backlog Items means that the backlog is not in a usable state, which is an impediment to the Developers.
2. Make the Impact Transparent
Next, I would facilitate a conversation to make the impact of unclear backlog itemstransparent:
* Developers cannot reliably forecast work,
* Sprint Goals are put at risk,
* Rework and waste increase,
* Delivery of value slows down.
This conversation should involve the Product Owner and be grounded inevidence, not blame. The goal is shared understanding of the consequences, not assigning fault.
3. Reinforce Product Owner Accountability
The Scrum Guide is clear that theProduct Owner is accountable for maximizing value and for Product Backlog management, which includes ensuring that Product Backlog Items are clear, understood, and ordered. Being "too busy" does not remove this accountability. As a Scrum Master, I wouldcoach the Product Ownerto recognize that insufficient availability is itself an organizational impediment.
4. Enable Collaboration, Not Handoffs
At the same time, I would coach the Developers that clarity is oftenco-created, not simply provided. Scrum encourages close collaboration between Developers and the Product Owner. Techniques such as:
* Regular Product Backlog refinement,
* Joint discussions during Sprint Planning,
* Asking focused questions around the Sprint Goal,can significantly improve shared understanding without relying on detailed upfront specifications.
5. Address Organizational Constraints
If the Product Owner's lack of availability is due to organizational overload or competing responsibilities, this becomes asystemic impediment. In that case, the Scrum Master must raise this issue to the organization and help leadership understand that a Product Owner who is not sufficiently available puts product outcomes at risk.