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If you want to do a systems audit of 7.5.1, how do you decide upon a sample? Let s take as a given that each Map must be audited. Take the Process Control Map  you have 4 departments to choose from. Do you pick all of them or a subgroup? This is a decision you will have to make. You will not use a mathematical (statistical) basis  Neither does your registrar.
Remember: The idea is to ensure the system in general is working and that it is working across departments.
NOTE: This is a partially completed matrix. Your company has to define how YOUR functional departments fit in.
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