Graphically represented mutual dependency between two operating variables, with one or more variable parameters being used as parameters.
This kind of performance map can provide a complete overview of the behaviour of the respective device in all operating states recorded by the parameters.
Performance maps may be represented as Dürer's shell curves (Figure K 8 a) or in three dimensions (b).
Figure K 8: Performance map as a Dürer's shell diagram (a) and in three dimensions (b)