Stable intervals of weight based on preference structure with indifferent intervals

Based on preference structure with indifference threshold of multicriteria decision, a quantitative method to calculate variational intervals and weight stability intervals are proposed. The variational intervals or stability intervals showed different parameters variety range that keep the ranking results stable while the weight is changed. All results get by discussed parameters' restricted condition of keeping difference pairwise of alternatives and indifference pairwise of alternatives structure stable under the condition of single weight varied while other weights unchanged relatively. The proposed method extended the research range in parameters sensitivity analysis of multicriteria decision and a numeral example is used to illuminate the approach.