Abstract
This attempts to re-examine the typology of a decoupling status from the view of its quality(relative/absolute) and its degree(good/bad). Then, it shows what property of the decoupling status each of the indexes measure in terms of the quality and the degree of the decoupling status by drawing the current two decoupling indexes from the “coupling” concept .In addition, it proposes an approach to measure the degree of the decoupling status, while identifying (the type of) the decoupling status by having the environmental-efficiency-index-based-decoupling index, one of the two indexes, built into a decoupling status classification diagram.
