Just about every project will have some level of issue, challenge and sometimes... a real problem, like there is a doctor needed in a foreign country (Call American Express, they can help.) The examples below will show how some of these can be addressed. We always want everything perfect, however like the rest of life, perfect can be tough. My first choice is to get the image in camera, meaning shoot the perfect shot not needing any "Help". And we mostly get this. However almost every image can use some level of "Help".
As a photographer I will take the time to make the shoot get as close to perfect as I can, but sometimes things go wrong. A model's face breaks out the morning of the shoot, a bad hair day, the wardrobe does not quite fit the model correctly, the weather changes dramatically for the worse, a model wakes up very sick, a model got lost, had a flat tire, car quit, the model shows up and says "I can't do that because I'm allergic to: cats or dogs or horses or perfume" etc. I have experienced all of these issues and more.
If there is an issue, and if I know via experience it is a simple fix in post, I will tell the client and the styling crew, "Do not spend as lot of time on that". The reason? The "issue" may take 20 minutes to fix on set, and 3 minutes for me to fix this problem in post production. I would prefer to spend the time on set shooting.
Now if this is a video shoot, and I know via experience that the "issue" is a nightmare to fix in post, then I'll give the styling crew all of the time they need to make the correction.