Security Level Management (SLM) comprises a quality assurance system for electronic information security. The aim of SLM is to display the IT security status transparently across a company at any time, and to make IT security a measurable quantity. Transparency and measurability form the prerequisites for making IT security proactively monitorable, so that it can be improved continuously. SLM is oriented towards the phases of the Deming Cycle/Plan-Do-Check-Act (PDCA) Cycle: within the scope of SLM, abstract security policies or compliance guidelines at a company are transposed into operative, measureable specifications for the IT security infrastructure. The operative aims form the security level to be reached.