First 30 Days: Baseline the integrated plan, confirm scope and milestones, establish the weekly status and action-management cadence, validate workstream ownership, create the initial RAID and dependency views, identify critical-path threats, and recommend immediate recovery actions for any areas already at risk. IT Project Manager owns the Interim Data Architecture and Wave 1 Reporting project end to end: the integrated plan, the critical path, a dozen cross-functional dependencies, and the decisions on KPI definitions and hierarchy mappings that determine whether the reports land on time and mean the same thing to both companies.