NOVELTY - The device (1) has an initializing device (10) which is adapted to carry out the detection (S1) of the product maintenance measures. An analysis device (30) is adapted to select (S2) one of the performed product maintenance measure and the supported operating data analysis to be carried out maintenance tasks. The optimization of the undertaken maintenance operation is performed using operational data. A follow-up device (20) is designed to evaluate (S3) the operating data and to generate failure data about the product.    USE - Device for optimizing modular maintenance of product e.g. vehicle such as ship, land vehicle, aircraft, spacecraft, artificial spacecraft, railway vehicle or motor vehicle. Can also be used in hydroelectric plant, wind power plant, concentrated solar power plant, photovoltaic system or geothermal power plant, and nuclear power plant.    ADVANTAGE - The electronic assistance function in the context of maintenance of the product is improved. The error messages and the losses for the component through one or more preventive maintenance measures can be reduced. The follow-up device is designed to evaluate the operating data and to generate templates based decision to optimize the product maintenance. The efficacy and applicability of the system can be improved.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for optimizing modular maintenance of product.    DESCRIPTION OF DRAWING(S) - The drawings show the flowchart and block diagram illustrating the optimization of the modular maintenance of product.    Device for optimizing modular maintenance of product (1)    Initializing device (10)    Follow-up device (20)    Analysis device (30)    Step for detecting product maintenance measures (S1)    Step for selecting one of performed product maintenance measure and supported operating data analysis to be carried out maintenance tasks (S2)    Step for evaluating operating data and generating failure data about product (S3)