Total maintenance costs equal 11 passengers on the plane of 100, according to US Airways, which built its own repair shop in Philadelphia just for the trucks, baggage carts and the tugs that haul them.

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Maintenance is a much higher percentage of this total cost, so Dr Jonkers expects big savings through extending the concrete's service life.

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Total Cost of Ownership including not only software hardware installation and maintenance costs, but also including recommended counterparts required to assemble a best of breed solution stack.

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This is based on total cost of ownership factors including depreciation, financing, insurance, maintenance, repairs, fees and taxes and, of course, fuel consumption.

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Add the parallel help from a special industrialisation fund for the mining regions, and the state's total aid package amounts to just over FFr450m for the creation and maintenance of 7, 337 jobs.

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And, to get a basic point of reference, construction and demolition waste stems from the construction of buildings and civil infrastructure, total or partial demolition of buildings and civil infrastructure, road planning and maintenance most of which can be recycled in one way or another.

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TfL and London Mayor Boris Johnson were criticised in 2010 when delayed upgrades and maintenance work on the Jubilee Line led to several sections being shut for about 100 weekends in total.

BBC: Central London Jubilee Line shuts for tunnel repairs