This paper explains two iterative phase recovery methods where the goal of each one is different.The Phase Diversity method is used to recover the wavefront aberrations in optical incoherent imaging systems when an extended object is illuminated.The purpose of the Multi-plane Phase Retrieval method is recovering the object complex field seen from the image plane, therefore the object has to be illuminated with coherent light.Both methods are simultaneously used to pick out the aberrations and free aberrations object phase.The use of both methods is proposed as a methodology for the integration of optical instruments.