Ifmeasurable benefitswerenot defined, the organizationcannot assess whether the system achieved its intended goals, making it the mostcriticalissue. Measurable Benefits Not Defined (Correct Answer - D) No clear KPIs or success metricsmeans no way toevaluate ROI. Example:A company implementsan ERP systembut has no performance indicators to measure success. No Lessons Learned (Incorrect - A) Important but doesnot impact system effectiveness. Missing Dashboard Deliverables (Incorrect - B) A reporting issue,not a strategic failure. Budget Overrun (Incorrect - C) A financial concern butnot as critical as system success measurement. References: ISACA CISA Review Manual COBIT 2019 (Project Governance)