Fig. 1From: Improvement of pressure ulcer prevention care in private for-profit residential care homes: an action research studySystems Model of the Action Research Process (Lewin, [30]). Systems Model of the Action Research Process. The model is used to guide this study. It is an organizational development model of action research, with the aim of improving organizations through action research. There are three stages in this model: unfreezing, changing, and refreezingBack to article page