DataViz Migration - migrating from Cognos to Power BI

Thu, 02 Jul 2026 00:00:00 +0000

IBM Cognos Analytics platforms typically hold several years’ worth of business modeling: Frameworks, hierarchies, calculations, dimensions, measures, variables, and reports.

{openAudit} analyzes Cognos Frameworks, reports, and usage logs to reconstruct the dependencies between data sources, business objects, and reporting outputs.

Key point: in most Cognos estates, the value lies more in the Frameworks and business rules than in the reports themselves.

Analysis of the Cognos estate

The analysis covers Framework Manager, reports, queries, dimensions, hierarchies, calculations, filters, and variables.

The collected metadata makes it possible to reconstruct:

dependencies between objects;
relationships with data sources;
business objects and indicators exposed in reports.

Scope rationalization

Usage logs are cross-referenced with the platform’s metadata.

This phase identifies unused reports, duplicates, and obsolete Frameworks.

Result: the scope that’s actually used is isolated before migration.

Conversion to Power BI

Cognos Frameworks are analyzed and then converted to the target Power BI model.

Dimensions, hierarchies, measures, calculations, variables, and relationships between objects are reconstructed in the target semantic model.

Cognos expressions are converted to SQL or DAX depending on their nature.

Dependencies between Frameworks, reports, and data sources are preserved in the generated model.

Key point: business objects and calculation rules are reconstructed directly from the Cognos Frameworks.

Validation

Migrations can be carried out with dual Cognos / Power BI execution.

The indicators produced by both platforms are compared during acceptance testing phases.

Typical use case: progressive validation of reports before cutover.

Usage-driven migration

Reports can be migrated in batches based on how often they’re used and their business criticality.

Observed usage forms the basis for project planning and development prioritization.

Result: a reduced volume to migrate, with effort focused on active usage.

DataViz Migration - SAP BO, Power BI, Spotfire, or Cognos to an open, interoperable architecture

Thu, 02 Jul 2026 00:00:00 +0000

Data visualization platforms evolve regularly.

SAP BusinessObjects, IBM Cognos, Power BI, or Spotfire may succeed one another within the same Information System. Business objects, calculations, indicators, and business rules generally remain identical from one platform to the next.

{openAudit} analyzes technical repositories, semantic layers, and reports to reconstruct the dependencies between data sources, intermediate processes, and the objects exposed in dashboards.

Key point: the functional components of reporting platforms are extracted and then rebuilt in a format independent of the target technology.

Analysis of the decision-support estate

The parser-based analysis mechanisms cover SAP BusinessObjects universes, Cognos Frameworks, Power BI models, Spotfire Information Links, as well as the associated reports, dashboards, calculations, filters, and business objects.

The collected metadata makes it possible to reconstruct technical dependencies, semantic layers, and business rules.

Rationalization

Technical repositories are cross-referenced with usage logs. Unused reports, duplicates, and obsolete components are identified before the migration phase.

Result: a reduced scope for the actual migration.

SQL transcription

Queries, calculations, filters, aggregations, joins, variables, and business rules are reconstructed in the form of SQL.

The resulting SQL forms an open representation of the functional logic originally carried by the data visualization platform.

Key point: SQL becomes the pivot format for representing business objects.

{oa-lake}

The SQL processes are integrated into {oa-lake}.

{oa-lake} centralizes business objects, indicators, dimensions, business rules, and SQL transformations. The engine federates several data systems and exposes a single model to reporting tools.

Data can be materialized in Parquet format. Queries are generated against the physical systems or executed from the cache when needed.

Key point: business logic is defined once and then exposed to several data visualization platforms.

Cognos |