Dawson opened his own grocery store. He has observed that despite good sales of canned foods, many cans kept at the back of the shelf often ended up past their expiry date and needed to be thrown in the trash. He instituted a system of food the first in, first out (FIFO) rule in his store to ensure that food cans near their expiry date are sold before reaching that date.

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A food rotation system is a front-loading shelving unit that organizes and rotates food cans on a first-in-first-out basis (FIFO). An effective food rotation system is essential for storing food to prepare for catastrophes, preventing foodborne illness and controlling commercial kitchen costs. That is an explanation of the rule you would just have to put it in your own words.

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