Why explaining methods is not enough

Yesterday I went to the local grocery store to get two pieces of meat for dinner. I reminding the service personal to cut the meat across the muscle fiber. She was doing it wrong, but she told me that we was instructed to cut it that way to get cutlets that are cut across the fiber. Since I have to cut the meat into even smaller peaces, I resigned and took the wrongly cut meat which is shown in this post.

Q: Why should I cut the meat across the fiber?
A: It is much more tenderly when cooked


Q: How do I know if it is cut across the fiber?
A: You don't see any long lines on the cutting area

I am pretty sure they show her how to cut the meat properly because she was using the knife properly and she was cutting properly but just on the wrong side of the piece of meat.

This clearly demonstrates, that she knew the method, but didn't know about the expected result. One could say, that a completely described method leads to the desired result but I think they work hand in hand. the method might describe to turn the meat until you cut across the fiber but if she does not know, when the meat is cut across the fiber, there is no use in describing this step.

When you explain a method your coworkers shall follow, you also need to describe the expected result, at least for validation.