The CSD Tiers are based on Urgency, therefore assigning correctly will be vital:
TIER 1:  Low Urgency Queries (respond within 2hrs – resolved by COB)
 
- Billing / Accounts
 - IT / Portal Support
 - Lead time Request
 - CV Submissions
 - Sales Leads
 
TIER 2:  Medium Urgency Queries (respond within 1hrs – resolve within 3hrs)
 
- Bookings
 - POD Requests
 - Red Tag / Returns
 - Sanitisation Requests
 - Telephone Messages
 
TIER 3:  Urgent/High Urgency Queries (respond within 30min-1hr – resolve within 2hrs)
 
- Deliveries
 - Claims / Damages
 - None (assigning group)