If you have a system with low turnover of staff then intuitive is not the goal.

The goal is to efficiently transfer information with additional steps in a common language.

A similar example is the hand signals from the old trading exchange floors [1]. The point wasn't for it to be easy to learn. The point was to make it easy to transfer visual information across a very loud and boisterous place. Plus, you had to do it with both people you knew well and people you may never have worked with before.

1 - https://archive.nytimes.com/www.nytimes.com/interactive/2008...