Scrum Team
Scrum Teams are self-managed and cross-functional, meaning they internally decide who does what, when, and how. They have all competencies needed to accomplish the work without depending on others not part of the team and choose how best to completed their work, rather than being directed by others outside the team and designed to optimize flexibility, creativity, and productivity.
The Scrum Team is small, typically 10 or fewer people as smaller teams communicate better and are more productive. If Scrum Teams become too large, they should consider reorganizing into multiple cohesive Scrum Teams, each focused on the same product. Therefore, they should share the same Product Goal, Product Backlog, and Product Owner.
The Scrum Team is responsible for all product-related activities from stakeholder collaboration, verification, maintenance, operation, experimentation, research and development, and anything else that might be required.
Scrum defines three specific accountabilities within the Scrum Team: the Developers, the Product Owner, and the Scrum Master.
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Product Owner
The Product Owner is accountable for maximizing the value of the product resulting from the work of the Scrum Team. How this is done may vary widely across organizations, Scrum Teams, and individuals.
The Product Owner is also accountable for effective Product Backlog management, which includes:
Communicate vision and value to the Development Team
Developing and explicitly communicating the Product Goal
Creating and clearly communicating Product Backlog items
Ordering Product Backlog items
Ensuring that the Product Backlog is transparent, visible and understood.
Ensuring the Development Team understands items in the Product Backlog to the level needed
Leverage Scrum for frequent product inspection and adaptation
The Product Owner may do the above work or may delegate the responsibility to others. Regardless, the Product Owner remains accountable.
For Product Owners to succeed, the entire organization must respect their decisions. These decisions are visible in the content and ordering of the Product Backlog, and through the inspectable Increment at the Sprint Review.