ɪt klˈoʊsli ɹᵻlˈeɪɾᵻd tə ðə nˈoʊʃən ʌv dˈɑːmɪnəns ɪn ˌɑːptɪmᵻzˈeɪʃən ˈɔːlsoʊ nˈoʊn æz sˌʌbstɪtˌuːɾəbˈɪlᵻɾi ɪn ɐ kənstɹˈeɪnt sˌæɾɪsfˈækʃən pɹˈɑːbləm.
It closely related to the notion of dominance in optimization also known as substitutability in a Constraint Satisfaction Problem.