 The aim of this study is to compare the cost-effectiveness of major joint replacement in patients with short and non-fixed control group waiting time WT. After being placed on the waiting list, patients will be randomized into two groups through regular contact with the practice staff: 1 Patients with non-fixed waiting time patient undergoes hospitals normal procedure from the date she is added to the waiting list to the date of operation, and 2 patients with short waiting time operated in maximum three months. The main question is: is it possible to improve the cost-effectiveness of major joint replacement by shortening waiting time? 