Assessment of preventive maintenance interval for vehicles

The paper deals with the problem of determination of the optimal vehicle service maintenance interval of operation. The Weibull progression is the possible method for determination of the optimal interval of the vehicle service maintenance. The Nelson method was used for the determination of parameters of the Weibull progression and specification of confidence intervals. The initial programme of the vehicle maintenance is often developed in cooperation with a supplier and a user. However, the initial maintenance programme does not have to be optimal. That is why it is desirable to initialize data collection about real process of defect degradation and incidence immediately after the operation start. If these data are available, their analysis can be carried out and on the basis of the analysis the contents of the initial maintenance programme can be changed to better meet the requirements of the user.