Answer:
Zara management should not move from the decentralized business structure to a centralized one.
The reason is that each branch has a different location and therefore has a different customer base in addition to different cultures that prevail in that geographical region.
It is only possible to take action on time if faced with a problem according to what will suite that branch and is customer friendly. If the head office in Madrid makes decisions, they might not be familiar with all the traditions and might make unfriendly decisions.