3.2. Task identifications generation logic model
The generation of task identifications code and task content mainly based on the input content of
multi-layer task mapping content, maintenance task sequence information, CAD/CAE/CAM component
identification code, name and structure information of the PDM. After all the input data and
supplementary relationship combined together orderly, regulated by ATA2200 , verified by the
simulation of virtual maintenance system, the task identifications code and maintenance content which
accord with standards and pass the safety verification will be stored in the database and finally formed the
task-library. The generation conceptual model of task identification is shown in figure 2.