West Side Hospital has been in the midst of a major, organization-wide change for the past 18 months that involves new procedures in patient care and accountability, changes in job responsibilities, and some management transitions. Although it was chaotic for a while when implementing the changes, employees are starting to feel that things are becoming more stable, and they have come to accept that the new ways of doing things are better than the old ways. The hospital now appears to be in which stage of Lewin's three-stage model? Strategic vision Unfreezing Refreezing Change