Responding to an unforeseen threat that you either did not have a planned response for or has not been dealt with effectively by implementing your planned response is best described as a (n)

Workaround

Explanation:

Workaround is a term often used in project management, it is defined as a means or technique applied in overcoming an unforseen threat in a program or project, such that the project or programs continues, without solving the problem completely.

In other words, it is a bypassing technique, used as temporary fix to unforeseen threats, such that, the project continues, till a permanent solution is available.

in effective risk management