Highcharts custom visuals fix Amazon QuickSight multi-region dashboard limits

When carrier performance data spans regions like the US (3 carriers, 49 states) and UK (4 carriers, separate regions), native Amazon QuickSight visualizations fall short. It cannot encode which carrier dominates each geographic tile, render a radar chart comparing all carriers across categories, or produce bullet/dumbbell/waterfall charts needed for nuanced analysis. Workarounds like separate dashboards or stacked bars obscure insights and add maintenance. The solution: embed Highcharts as a custom visual in QuickSight. A tilemap chart with colorAxis.dataClasses shows carrier dominance (including ties) across regions; a polar line chart creates true radar polygons for multi-carrier, multi-category comparison; bullet charts show performance against targets; dumbbell charts expose spread between best/worst markets; waterfall charts break down period-over-period deltas. All configured via a single JSON file.

Architecturally, teams must balance simplicity with data sovereignty. Option 1 stores all data in one AWS Region (e.g., us-east-1), using a SPICE dataset with a country column—simpler but may violate UK GDPR if PII is involved. Option 2 places US data in a US Region and UK data in a UK Region, satisfying legal requirements for personal and network performance data. QuickSight's federated dataset capability then unifies these sources into a single, compliant dashboard. This approach also addresses security, compliance (data residency), and scalability needs, delivering production-ready chart configurations that let stakeholders make confident, data-driven decisions across markets.