| http://www.w3.org/ns/prov#value | - Hire them to do the right job such as come up with a preventive maintenance program/replacement cost schedule. (lots of data on highways, aircraft, trucks etc. usually based on utilization) In his field, any competent engineer can calculate to a useful degree of precision the optimum cost and level of ongoing maintenance such as for a roadway, building or other piece of equipment to reach its maxi
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