  Relative ageing describes how a system ages with respect to another one. The
ageing faster orders are the ones which compare the relative ageings of two
systems. Here, we study ageing faster orders in the hazard and the reversed
hazard rates. We provide some sufficient conditions for proving that one
coherent system dominates another system with respect to ageing faster orders.
Further, we investigate whether the active redundancy at the component level is
more effective than that at the system level with respect to ageing faster
orders, for a coherent system. Furthermore, a used coherent system and a
coherent system made out of used components are compared with respect to ageing
faster orders.
