Nursing theories and models although have emerged a few decades in nursing developed countries, they have not attain extensive usage in all clinical settings worldwide. Some authors have strongly argued that it is impractical for practitioners to practice without a model, as models encourage a questioning approach and enable the delivery of high standard nursing care. The article utilising theories of change analyses a proposed model for the application of Orem's self - care deficit theory and Roper, Logan and Tierney model into clinical practice. The process of change has been considered crucial for the development of the profession and its successful management with the introduction of innovations into clinical practice is expected to contribute to the advancement and transformation of the health - care system. It is anticipated that the active involvement of nurses within a changing process will facilitate their familiarisation to the special features of a planned change project in their own working environment as well as improving the total care provided by meeting patient's needs.