The reliability scientists have always investigated the ageing properties of different systems structures and for this reason utilizing applicable tools is vitally important. The Gini-type index is an applicable diagnostic tool to realise the ageing properties of lifetime variables. In this paper Gini-type and its properties are studied. Besides different illustrative examples are given for further intuition. Later, a new stochastic order in terms of Gini-type index is introduced to compare the speed of ageing of components and systems.