Remanufacture is seen as a vital tool for reducing the cost of regular heavy overhaul, and most components will be remanufactured rather than replaced. Rolling stock has been designed with a lifetime of 30-40 years, and as such will go through several cycles of remanufacture, either in full or in part. A well developed network of remanufacturers and maintenance depots exists to service the sector, consisting of both OEMs and third parties. The future will depend largely on the prosperity of the rail system and government transport policy but there is no doubt remanufacture will continue to be of great importance.