METHOD FOR MONITORING FUNCTIONALITY OF SYSTEM, MONITORING DEVICE THEREFOR, MEMORY CELL AND COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To simply and easily monitor functionality of a system provided with complicated functions without depending on hardware. SOLUTION: The function according to stipulations of the system is divided into at least one sub system function hierarchically corresponding to complication of the function and the sub system function is divided into at least one function unit further. Also, a method is structured as the following: one of the function units of the system 1 is inspected by considering an input signal and/or an output signal of the function unit inside a first monitoring layer; the function unit is inspected by considering the input signal and/or output signal of the sub system corresponding to the function unit further inside a second monitoring layer; the function unit is inspected by considering the input signal and/or output signal of the system further inside the other monitoring layer.