Due to their highly complex architecture, 3 suffered from the following problems:

• Time-consuming service order processes with mass transactions such as customer activations, tariff/number changes, etc. led to poor business process metrics and to a poor customer experience with 3
  
  
• Long IT development times mandated fewer and larger releases per year planned many months in advance, very high development and coordination/management costs and long time-to-market and poor business flexibility
  
  
• The lack of error detection/management and the lack of traceability in complex distributed processes necessitated constant manual intervention to localize and recover from errors resulting in high operational costs and high maintenance efforts for system and business operations