Should a action plan be changed if it's already in place ?

I personally think people should always stick to a plan unless it is obvious it will not work. Even if there is a better plan but other people are already acquainted with the initial plan it is best to stick with the original plan and not bother explaining another one.

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.