Challenge A leading supplier of heavy building materials, HeidelbergCement is the global market leader in aggregates and a prominent player in the fields of cement and ready-mixed concrete. The company employs around 55,000 people at 2,500 worldwide locations and in 2010 generated revenue of €11.8 billion. BT and HeidelbergCement have been working together since 1999, when its landline telephony was migrated to BT. In 2005, the relations

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