Recognizing the urgency of the situation, our team was engaged to rescue the data warehouse migration project. We immediately initiated a series of brainstorming and design discussions to chart a path forward.

1. Core Capabilities Identification: Through rigorous brainstorming sessions, we quickly identified the core capabilities that were dependent on specific data sets. This allowed us to prioritize our efforts on the most critical data components.
2. Strategic and Tactical Solutions: A two-pronged approach was devised. First, a strategic solution was designed to manage the migration of over 98% of the data sets. Complex scripts and robust business rules were employed for mapping and validation.
3. Tactical Resolution: Simultaneously, we created a tactical solution to address the remaining 2% of data sets, comprising approximately 30,000 rows of data. While this portion of the project would extend beyond the initial deadline, it was scheduled to be completed within an agreed-upon timeframe.

By dividing the deliverables into two components, we strategically separated the 2% problem data sets from the core data, allowing the business to benefit from the successful migration of the critical 98% data sets immediately. The remaining 2% could be addressed over the following 2-3 months.