The primary objective of the model verification is to establish a comprehensive test scenario set.In order to solve the problems of current existed model verification methods

a model verification method based on qualitative trend and signed directed graph (SDG) is proposed in this paper.First of all

by summarizing various SDG modeling methods studied in previous research

a modeling method of the SDG verification model is proposed.Secondly

the model verification method based on qualitative trend and SDG is presented

including the establishment of SDG verification model

generation of test scenarios

reasoning of standard trend

extraction and identification of simulation model data trend

and comparison of qualitative trends.Finally

this paper takes Tennessee Eastman process as an example to prove the validity of the aforementioned method.