I'm reminded of procedures in the [US] defense industry. A "good step" in a given procedure would be absolutely clear in mind-numbing detail. "Pretend you're writing for a sailor" may be half a joke but it is also very real; sometimes word does get back to you about how something was unclear and a piece of equipment got buggered [or whatever], you look at the section in question, and all you can think is "How can you fuck this up?" but yes a pair of sailors in the Pacific did and now you have to make Sesame Street even easier to understand.

No offense to any of our sailors intended, and this is also true for civilians. You won't necessarily have The Expert or The Author right there during execution, for example.

Also on top of that: sometimes the procedures really are hosed [first draft going live, change the test at the last minute, whatever] and deliberation has to be made until you can rewrite the step for clarity//accuracy//reality and move along. Bring lots of red pens, bring more than you need because you'll burn through all of them.