You keep a single source of truth across multiple common data environments (CDEs) by deciding which platform owns each piece of information, then syncing that information automatically to every other platform that needs it, with every change logged. CDE Sync™ does the syncing and logging, so each organisation can keep its own CDE while everyone works from the same current record.
What a single source of truth means on a multi-CDE project
On a project with one CDE, the single source of truth is simple: the CDE holds the current version of everything. Most large projects now run several CDEs, because each party brings its own and the client often mandates another. In that world, a single source of truth does not mean a single platform. It means every document has one authoritative home, and every copy elsewhere is kept identical to it automatically.
When copies are kept in step by hand, that breaks down quickly. A drawing is revised in one platform but not uploaded to another for several days. A status changes on one side only. People act on what they see, and what they see depends on which platform they opened. Our article on the hidden cost of file version errors covers what that costs.
Three principles that make it work
The first principle is ownership. For each type of information, agree which platform is authoritative. Design documents may be owned in the designer's CDE, submissions in the client's, and site records in the builder's. The second is automatic sync. Copies are updated by rules, quickly and consistently, so nobody has to remember to transfer them. The third is traceability. Every transfer is logged, so anyone can see where a copy came from, when it was updated and which version it reflects.
How to keep a single source of truth, step by step
List the CDEs on the project and the organisations that use each one.
For each type of information, agree the owning platform and the platforms that need copies.
Record those decisions in the project's information protocol or BIM execution plan.
Agree a common metadata standard, usually based on ISO 19650, so copies carry the same meaning everywhere.
Connect the platforms in the CDE Sync™ wizard with one-way rules from each owner to its copies, or two-way rules where shared editing is agreed.
Test with a representative set of documents and confirm versions and metadata match on every side.
Monitor the audit log and review the ownership rules as the project changes.
Handling the hard cases
Some information is genuinely shared, such as coordination models that several parties update. For these, two-way sync with clear rules about who edits what avoids conflicts. Other information changes owner during a project, for example when design hands over to construction. Updating the ownership rules at that point, and recording the change, keeps the source of truth clear. At the end of the project, the authoritative record should be captured in one place the asset owner controls, which is where CDE Archive™ fits.
Signs the source of truth is slipping
A few warning signs suggest the source of truth needs attention. People ask which platform holds the latest drawing. Site teams print from one platform while designers update another. Document controllers keep their own spreadsheets to track what has been sent where. Clients reject submissions because the revision does not match what they already hold. Each of these points to manual transfers or unclear ownership. Reviewing the ownership rules, connecting the platforms involved and checking the audit log usually resolves them quickly, and stops the same problem recurring on the next project.
Security and control
Each organisation keeps its own permissions, and only agreed information moves between them. CDE Sync™ streams files directly between platforms without storing them, encrypts data in transit and processes it in the Azure region you choose. Utopia Digital holds SOC 2 Type II and Cyber Essentials. See the Security Trust Portal.
A single source of truth and the Utopiaverse™
The Utopiaverse™ extends the single source of truth beyond live delivery. CDE Sync™ keeps platforms aligned, CDE Backup™ keeps an independent copy in your own Azure, CDE Migrate™ preserves the record through platform changes and CDE Archive™ captures it at completion. AI Insights then searches the connected record across every project and platform. Related reading: How Do I Build a Federated CDE Across Subcontractors? and connected common data environments.
See it in the monthly live demo, or talk to the team about your project.
