"Using the risk-based approach presented by the ISPE Guide (i.e., system and component level classification) limited qualification activities to verifying and testing critical aspects of direct impact systems and their critical components."

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The proposition of an established classification of states as slave states and free states, as insisted on by some, and into northern and southern, as maintained by others, seems to me purely imaginary, and of course the supposed equilibrium of those classes a mere conceit.

— William H. Seward