Before revision: It is defined by the Royal Institution of Chartered Surveyors as "an additional element of value created by the combination of two or more assets or interests where the combined value is more than the sum of the separate values" RICS Global Professional Standards 2017 .
After revision: It is defined by the Royal Institution of Chartered Surveyors as "an additional element of value created by the combination of two or more assets or interests where the combined value is more than the sum of the separate values" RICS Valuation -Global Standards 2020 .