single source of truth
expressionops cultureprogramming
The principle that each fact should have exactly one authoritative home, with everything else derived from it.
Two authoritative spreadsheets is how organizations institutionalize Segal's law. In practice SSOT means declaring which system wins - the IPAM, the repo, the CMDB - and making every copy provably downstream. Configuration drift is what happens when nobody declared.
Also known as: SSOT