breakdown
noun
uk/ˈbreɪkdaʊn/ us [ C or U ]
a failure to work correctly or to be successful:
The city is losing millions of dollars in lost productivity because of all of the mechanical breakdowns and system failures.
Each side blamed the other for the breakdown of the negotiations.
breakdown in sth There has been a breakdown in communication between management and staff.
( US also breakout)
a division of something into its parts, so that you can see all the details:
I asked for a full breakdown of the costs involved in setting up a new website.