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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.
regime - (medicine) a systematic plan for therapy (often including diet) regimen. plan, program, programme - a series of steps to be carried out or goals to be accomplished; they drew up a six-step plan; they discussed plans for a new bond issue.