Definition
Institutional knowledge is the accumulated understanding of how an organization actually works: the reasoning behind its decisions, the exceptions to its documented processes, the history of its relationships, and the judgment calls that experienced people make without being told to. It is held predominantly in individuals rather than in systems, which is why it leaves the organization when they do.
Why it matters
An organization whose institutional knowledge lives in people is one resignation away from losing part of itself, and it cannot tell in advance which part. New employees spend months rebuilding context that already existed. AI systems cannot inherit any of it, because it was never written anywhere they can reach. Institutional knowledge only becomes an asset when it stops being a property of individuals and becomes infrastructure the organization owns.
Where it comes from
A long-established term in management and organizational theory. The Human Layer series treats institutional knowledge as the raw material of Organizational Memory: the informal, person-held layer that a memory layer makes durable, governed and inheritable.
Read the source papers: The Human Layer · The Sovereign Memory Layer