Three Potential Bottlenecks and/or Fail Points

Major:  marketing
Unit code:
Requirement:
Please look at the homework requirements. What you need to write is that I have marked the picture with red.
 

my question is: Identify and describe three potential bottlenecks and/or fail points.

The fail point is based on the service blueprint,which is about buying clothes in Muji. And one of the fail points we think of is fitting room, where staff should keep fitting room clean.