Maintenance The “Maintenance” module is intended to plan and monitor vehicle maintenance, as well as to predict the onset of a maintenance date based on engine hours and vehicle mileage. The module is divided into 2 main tabs: 1. Plan The tab is intended to plan works and costs on vehicle maintenance, as well as for monitoring data on completed, planned and overdue works, presented in graphical form. 2. Schedule The tab is intended for entering data on the performance of vehicle maintenance works.