intervention

The act or process of intervening.

The systematic process of assessment and planning employed to remediate or prevent a social, educational, or developmental problem.

An act that alters the course of a disease, injury, or condition by initiating a treatment or performing a procedure or surgery.

A planned, often unannounced meeting with a person with a serious personal problem, such as addiction, in order to persuade the person to seek treatment.

The act or state of intervening; a coming between; interposition; mediatorial interference.