Controls & technical basics
A safeguard made of rules, roles and routines - who decides, who does what, and how work must be done.
Formal
A security control carried out through policies, processes, responsibilities and agreements - such as supplier management, access approval or an incident process - one of the four control themes in ISO 27002.
In plain English
Like the plan for a school trip - the teacher counts heads at every stop, children walk in pairs, and nobody leaves the group without telling an adult. No fence is needed.
In practice
A housing association writes down that a new user account needs the head of department's approval and that HR tells the IT department the same day someone leaves.
Why it matters
It is the largest group of controls in ISO 27002, and without clear rules and owners even good technology is set up and used at random.