Las entradas son los elementos de que el sistema puede disponer para su propio provecho. Las salidas son los objetivos resueltos del sistema; lo que éste se propone, ya conseguido. El proceso lo forman las «partes» del sistema, los «actos específicos».???? ???? ??????? ?????? ???? ?????? ????????? ?? ????? ???? ?? ????? ?? ??? ? ???? ???????

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