Quality in health institutions is considered a sound method and approach to improve and provide distinguished health services in order to meet the requirements of patients and gain their satisfaction to the fullest, and this is a result of the significant increase in recent years and an increasing number of patients attending health institutions, and this This is due to the increased spread of health awareness among members of society, as well as the increase in the presence of chronic diseases and epidemics.

 This increase in the number of patients was accompanied by the emergence of several new problems, such as the presence of long queues in front of service centers and the long waiting time for patients, which sometimes leads to a further deterioration of their health condition, which has a direct impact on the quality of health services provided.

And here appeared many tools and techniques used in operations research, the most important and most famous of which are waiting queue models, which have been widely used in this field.