After an acquisition or a carve-out, company data sits in separate systems. Group reporting then becomes a negotiation, because every figure depends on where the record came from. The wish for a single view is understandable and technically achievable.
The right diagnosis matters. The difficulty rarely lies in storing data in one place, but in the relationships between records: which order belonged to which production lot, which batch the material came from, which machine processed it. Only these links make analysis along the product lifecycle possible.
Three recommendations come out of our projects. Name the use case before the platform. Clarify the identifiers that connect records across system boundaries before any technology is purchased. Include permissions and data protection in the first design, because retrofitting them is particularly costly here. And a shared analytics layer buys time for a consolidation without replacing a common core system.