What is Single Source of Truth (SSoT)?
Single Source of Truth (SSoT) is a useful ambition, but it is rarely a clean end state. In real projects it usually becomes a negotiated and partial truth across several systems, rather than one perfect source that actually holds for everything.
Technical Definition: An architectural principle aiming for a single authoritative source, but in practice this is often partial, contextual, and maintained through mappings, governance, and compromise. It reduces inconsistency, yet it does not eliminate ambiguity across systems.
Why it matters: Without a SSoT, different departments make decisions based on different versions of the same data. Energy figures differ between the BMS and the utility bill; maintenance records differ between the CMMS and the control system. In practice, SSoT is less a finished product than a coordination problem with a nice name.
HubMind’s view: A Unified Namespace can be one way to organise shared operational context across industry, infrastructure, and facilities, but it is not a clean or universal implementation of SSoT. SSoT is a principle, not a product, and there is no unified off-the-shelf solution for it; what exists are highly custom, database-heavy builds stitched together for a specific use case, and even those are only partial answers.
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