The team should ask the product owner to prioritize the item with the customer, as the product owner is responsible for managing the product backlog and ensuring that it reflects the customer’s needs and expectations. The product owner should collaborate with the customer to understand the value and urgency of the enhancement, and decide whether to add it to the product backlog, modify an existing item, or defer it to a later time. The team should not refine and estimate the enhancement, add it to the product backlog, or start working on it without the product owner’s approval, as this may violate the agile principle of customer collaboration and the role of the product owner as the sole authority for the product backlog. References:

A Guide to the Project Management Body of Knowledge (PMBOK® Guide) – Seventh Edition, Chapter 14: Team, Section 14.2: Enable Team Performance, Section 14.3: Lead the Team

Agile Practice Guide, Chapter 2: Life Cycle Selection, Section 2.2: Implementing Agile: Creating an Agile Environment, Section 2.3: Implementing Agile: Delivering in an Agile Environment

Professional in Business Analysis (PMI-PBA)® Handbook, Section 2.3: Domains and Tasks, Domain 4: Analysis, Task 9: Validate Requirements

Professional in Business Analysis (PMI-PBA)® Examination Content Outline, Domain 4: Analysis, Task 9: Validate Requirements