In Agile environments, value delivery is driven by an actively managed and prioritized product backlog.
When a customer feels that value is not being delivered according to the original scope, the first action the project manager should take is to ensure the backlog accurately reflects customer priorities. The Product Owner is responsible for backlog prioritization, but the project manager facilitates stakeholder engagement and ensures that feedback leads to backlog refinement.
According to the Agile Practice Guide, "Backlog refinement is a key mechanism to adjust scope and priorities throughout the project." Misalignment between delivery and customer expectations often originates from improper backlog management.
Options A and B refer to logs that track issues and changes, but these are reactive records and don't directly address value delivery. Option D (risk register) deals with potential problems, not actual missed value.
References:
Agile Practice Guide, Section 5.3: Product Backlog and Prioritization
PMBOK Guide - Seventh Edition, Value Delivery and Adaptive Planning
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