What are the advantages and disadvantages of centralising business services at group level instead of leaving them inside the single airlines?

Organizational Structures of IAG Group and Its Business Units

What are the advantages and disadvantages of centralising business services at group level instead of leaving them inside the single airlines?

– What other activities could be centralised at the group level without significantly impacting the wider business and strategic business units?

– Identify the various types of airline metrics – financial and non-financial which are reported at group level and state why these are important for the organisation at group and those at strategic business units.