I would apply it to inputs as well.

Suppose you can start production with only 1 of each input required for a recipe, but to keep it going you need to keep feeding all of the inputs to finish it. If any of them run out, then the recipe fails, you lose the inputs, and the machine stalls.

This works better for high latency recipes (>10s) with lots of inputs, like low density structure, modules, and atomic bombs.