Explanation
Box 1: Queue
Presales inquiries captured from the company website must be handled by dedicated teams for each country on a first-come, first-served basis.
The idea of FIFO queuing, also called first-come, first-served (FCFS) queuing, is simple: The first item that arrives at a router is the first item to be handled.
Box 2: Workstream
Presales inquiry handling must be maintained separately from support call handling.
A workstream is a container to enrich, route, and assign work items. The workstream is associated with a channel, such as live chat, voice, or case.
The workstream can belong to multiple channels of the same type, like multiple chat channels. In this case, all the conversations from these channels inherit the routing and work assignment settings of the workstream they belong to.
Box 3: Assignment ruleset
Support calls for specific HVAC systems must be directed only to their respective certified technicians.
Assignment methods determine how a work item is assigned. You can use the out-of-the-box assignment methods or build custom assignment rules by configuring the prioritization rules and assignment rulesets The following assignment methods are available out of the box:
* Highest capacity: Assigns work item to the agent with the highest capacity, among those who have the skills identified during the classification stage, and who have the presence as specified in the allowed presence option of the workstream. In this assignment method, the work items are prioritized in the first in first out manner, that is, the work item that was created first is assigned first. If more than one agent is available with the same capacity, the work item is assigned randomly.
* Round robin
Reference:
https://www.sciencedirect.com/topics/computer-science/first-come-first-served
https://docs.microsoft.com/en-us/dynamics365/customer-service/create-workstreams
https://docs.microsoft.com/en-us/dynamics365/customer-service/assignment-methods

Explanation
Cases that come in as phone calls must be resolved with seven business days.
Cases that come in as emails must be resolved within three business days.
Note: Service-level agreements (SLAs) enable businesses to track support policies and ensure customers are being supported per the support policy to which they are entitled. Businesses use SLAs to govern support products that customers either receive as part of their purchase or add on to their purchase. SLAs include policy details such as how quickly a customer is entitled to receive support, how many support requests a customer can make, and how long after purchases a customer can be supported as part of the agreement.
Note 2: Create SLAs to define conditions and actions that are applicable when an SLA is applied to an entity.
The following steps are involved in creating the SLA:
Create an SLA.
Create an SLA item.
Configure actions for the SLA item.
Activate the SLA.
Reference:
https://docs.microsoft.com/en-us/dynamics365/customer-service/define-service-level-agreements

Explanation