Which role on the delivery team builds the product right.

The Architecture Owner (AO) is a primary role on a Disciplined Agile team responsible for the team's technical direction. A key distinction in DA is between "building the right product" (the Product Owner's responsibility) and "building the product right" (the AO's responsibility). The AO guides the team in making appropriate design and architectural decisions to ensure the solution is robust, scalable, and technically sound, thereby ensuring the product is built correctly from a technical standpoint.

A. Team Member: While team members perform the construction, the AO is the specific role that owns the technical vision and guidance for "building it right."
B. Team Lead: The Team Lead focuses on facilitating the team's process, removing impediments, and fostering a healthy environment, not on owning the technical architecture.
C. Product Owner: The Product Owner is responsible for "building the right product" by prioritizing work to maximize value, not the technical implementation of it.

Ambler, S., & Lines, M. (2019). Choose Your WoW!: A Disciplined Agile Delivery Handbook for Optimizing Your Way of Working. Project Management Institute.

Page 43, "Architecture Owner" section: "The AO is the person who is responsible for guiding the team to build the product right..."

Page 42, "Product Owner" section: "The PO is responsible for ensuring the team builds the right product..."