ICUKU is an acronym that stands for Impact, Controllable, Known, Uncontrollable, Unknown. It is a 9 blocks matrix tool that helps in prioritization of problems / projects / causes.
An application-oriented question on the topic along with responses can be seen below. The best answer was provided by Sundeep Kailwoo on 2nd Apr 2021.
Applause for all the respondents - Suresh Sekar, Sundeep Kailwoo