In context of Usability

The interface will allow the user to perceive that they are in control and will allow appropriate control.

Stanford University Usability Principles

In context of DevOps

In the context of DevOps, controllability refers to the ability to effectively manage, manipulate, and influence the behavior of systems and processes throughout the software development and deployment lifecycle. Key aspects are:

  • Infrastructure Control
  • Deployment Control
  • Monitoring and Observability

Devops.com