Well... work instructions are in fact procedures... so that's why you may be confused.
I try to stick with the following definitions:
Policy - things like GMP's, explanation on how you deal with allergens, expectations of management (management commitment policy), explanations of programs
Work Instruction - Detailed instructions on how to accomplish a task
It is going to suck but you may want to rewrite all of your documentation into a standard format so that all of your policies look the same and all of your WI's look the same.
Some people may have a definition on a difference between a WI and a procedure... but really they are the same thing and you should treat them as such in my opinion. Keep your documentation simple. If it's too complex you'll have problems.
I also suggest, when making work instructions, that you write them where you spell out every single step required including changing rooms and use the "3rd grade standard or whatever" where a 3rd grader could read it (excluding terms that are relevant of course). This way you know that there will be no issue with someone who can't understand it.
"On PLC 1 in the batching room press "Start Batch" then in the box next to gallons touch the screen inside the box and on the window that pops up enter the amount of gallons needed for the batch and hit enter"
or something like that...
Edited by Mr. Incognito, 12 June 2014 - 11:16 AM.