PSM-III最も有効な質問と解答で勉強

正解：

Scrum is fundamentally based onEmpiricism, also referred to asEmpirical Process Control. This means that Scrum recognizes that complex work, such as software development, cannot be fully understood or predicted upfront. Instead, decisions are made based onexperience, observation, and evidence, forming a continuous closed feedback loop.
Empirical Process Control rests on three pillars:Transparency, Inspection, and Adaptation. Scrum provides a structured framework of roles, events, and artifacts that explicitly support and reinforce each of these pillars.
Transparency
Transparency ensures that all significant aspects of the process and product are visible to those responsible for the outcome. In Scrum, transparency is created through clearly defined artifacts such as theProduct Backlog, Sprint Backlog, and Product Increment, each governed by a shared Definition of Done. Scrum Events further enhance transparency by creating regular opportunities to share progress, challenges, and current state.
Without transparency, inspection would be misleading and ineffective.
Inspection
Scrum prescribes frequent and regularinspectionof both the product and the process. Each Scrum Event serves as an inspection point:
* TheDaily Scruminspects progress toward the Sprint Goal,
* TheSprint Reviewinspects the Increment and adapts the Product Backlog,
* TheSprint Retrospectiveinspects the team's ways of working.
These inspections are intentionally timeboxed and lightweight to avoid excessive overhead while still enabling timely feedback.
Adaptation
Inspection is meaningful only if it leads toadaptation. Scrum explicitly enables adaptation by allowing changes to plans, processes, and backlog content based on what is learned. The Sprint Backlog may be adapted during the Sprint, the Product Backlog is adapted after the Sprint Review, and team practices are adapted following the Sprint Retrospective.
Closed Feedback Loop
Together, transparency, inspection, and adaptation form aclosed feedback loop. Scrum's short iterations (Sprints) ensure that learning occurs frequently, enabling the Scrum Team and stakeholders to respond quickly to change, reduce risk, and improve outcomes over time.

正解：

According to Scrum, theProduct Owneris accountable formaximizing the value of the productand for effectiveProduct Backlog management. Two key activities that are explicitly part of this role are:
1. Ordering the Product Backlog to Maximize Value
The Product Owner is responsible forordering the Product Backlogso that the most valuable work is done first. This ordering reflects:
* Business and customer value,
* Risk and uncertainty,
* Strategic goals and learning from previous Sprints.
Through this activity, the Product Owner ensures that the Scrum Team is always working on what matters most.
2. Ensuring Product Backlog Items Are Transparent, Clear, and Understood The Product Owner ensures that Product Backlog Items are:
* Clearly expressed,
* Transparent to the Scrum Team and stakeholders,
* Understood well enough for Developers to select them during Sprint Planning.
This does not mean writing detailed requirements alone, butcollaboratingso that shared understanding exists.

正解：

When multiple Scrum Teams work together on a single product usingScrum Nexus, managing dependencies and ensuring effective integration are critical to delivering a usable Increment each Sprint. Scrum Nexus extends Scrum by explicitly addressing the complexity that arises from multiple teams working on the same product.
First,dependencies between teams should be minimized. Dependencies reduce autonomy, slow feedback, and increase risk. In Nexus, Product Backlog Items should be ordered and refined in such a way that work with strong dependencies is keptwithin a single team whenever possible. This supports cross-functionality at the team level and reduces the coordination overhead required between teams.
Second, when dependencies cannot be avoided, they must be madetransparent and actively managed. The Nexus framework encourages early identification of dependencies during Nexus Sprint Planning so that teams can coordinate their work effectively. However, the goal remains to continuously reduce dependencies over time through better backlog ordering, architecture improvements, and skill broadening.
Third,integration of work is vital and takes precedence over completing all planned work. In Scrum Nexus, an Increment is only considered "Done" when the work of all teams is fully integrated and meets the shared Definition of Done. Unintegrated work, even if technically complete by an individual team, does not provide value and increases risk.
Fourth, integration must occurearly and often during the Sprint, not only at the end. Continuous integration helps uncover issues sooner, supports frequent inspection, and enables timely adaptation. Delaying integration increases the likelihood of defects, rework, and failure to produce a usable Increment.

正解：

In Scrum, decisions to optimize value and control risk depend on theperceived state of the artifacts. If artifacts are not transparent, inspection and adaptation become ineffective, leading to poor decisions. Scrum therefore defines specificevents and practicesto improve transparency and support empirical decision- making.
Scrum Events That Improve Artifact Transparency
Sprint Planningimproves transparency by aligning the Scrum Team on the current state of theProduct Backlogand theProduct Increment. The Product Owner explains backlog ordering and objectives, while Developers assess what is feasible based on the current Increment and Definition of Done. This shared understanding reduces risk by creating a realistic Sprint Goal.
Daily Scrumimproves transparency of theSprint Backlog. Developers inspect progress toward the Sprint Goal and make visible emerging risks, dependencies, and impediments. Daily inspection ensures that deviations are discovered early, enabling fast adaptation and reducing delivery risk.
Sprint Reviewimproves transparency of theProduct IncrementandProduct Backlog. Stakeholders directly inspect the Increment and provide feedback. This exposes assumptions, validates value, and informs Product Backlog adaptation, helping optimize future value and reduce market risk.
Sprint Retrospectiveimproves transparency ofprocess-related aspectsthat influence the artifacts. By inspecting ways of working, tools, skills, and the Definition of Done, the team identifies improvements that increase artifact quality and reliability over time.
Practices That Improve Transparency
Aclear and shared Definition of Doneensures transparency of the Product Increment. It creates a common understanding of what "complete" means and prevents hidden work or misleading progress.
Product Backlog refinementimproves transparency by clarifying Product Backlog Items, making assumptions explicit, and reducing uncertainty. Although not a formal Scrum event, refinement supports better inspection and forecasting.
Frequent integration and testingimprove transparency by making the real state of the Increment visible early and often. This reduces the risk of late surprises and unintegrated work.
Visible metrics and information radiators(such as Sprint Goals, Sprint Backlogs, and progress toward objectives) help stakeholders and teams understand the state of work without relying on reports or interpretations.