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Here are some definitions to help clarify things. A Policy is a guideline or statement of position with respect to a given topic. A Process is the highest level description of a large task or series of related tasks. It provides the BIG picture.
A procedure is a sequence of steps for completing a given activity. A procedure may outline the manner in which a particular policy is to be implemented, but it cannot take the place of that policy. Recall that a good policy is inviolate, that is, policies change slowly and infrequently if at all.