To reduce the subjective interfere with system structural analysis, by taking the relation effect of integrant/attribute
into consideration, a system structural analysis model based on relation attribute is proposed. Based on the qualitative
analysis the estimation matrix and the effect relation matrix are constructed. Then contribution degree and relation degree
are acquired according to the fuzzy relation matrix of attribute-to-attribute with relation integrant. Application example
shows the practicability and feasibility of the proposed method.