640bc943_IT_Service_Management_strategy__What_it_means
[Service catalog] Service Manager [Who provides it] ITSP Enforces accountability from the ITSP for the management point of contact for the service. [What it means] 
Accountable ITSP individual with whom the decision rests for ensuring the service delivers value. This individual will meet with the business owner on a regular basis as part of the service-level agreement terms.
ITIL chief architect: How to build an IT Service Management strategy
What it means