2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93898New exactly solvable problems have already been studied by using a modification of the factorization method introduced by Mielnik. We review this method and its connection with the traditional factorization method. The survey includes the discussion on a generalization of the factorization energies used in the traditional Infeld and Hull method.15 pages, LaTex file, minor changesQuantum Physicstext