Local vs. centralized Service Desk

Both of the solutions have some pros and cons. Here are the characteristics.
Local Service Desk:Physically situated on User site
- No language or cultural barriers
- Same time-zone
- Specialized User- groups
. specialized or Customer aligned Services including specific Knowledge
- Users have "VIP" treatment

Central Service Desk:
- Service Desk employees located at central site
- Cost-efficient
- Greater Call-Volume
- Higher Skill-Level
- "Training-effect"
- Additional local presence possible

Read the article "ITIL Service Desk types" https://advisera.com/20000academy/blog/2014/05/06/itil-service-desk-types/ for more information.