For Universal Containers to manage different support processes and fields for two separate business groups, implementing Record Types is recommended. Record Types allow the creation of distinct page layouts for each business group, enabling customization of support processes and fields to meet the specific needs of each group, ensuring effective and organized case management.

Explanation
These two metrics are useful for identifying knowledge article effectiveness, as they indicate the gaps and weaknesses in the knowledge base. Knowledge search query with no results shows how often customers and agents search for something that is not covered by any article, which suggests a need for creating new content.
Knowledge articles with the lowest rating shows how satisfied customers and agents are with the quality and relevance of the existing articles, which suggests a need for improving or updating the content. Verified References: Report on Salesforce Knowledge Articles and Knowledge Base Dashboards & Reports

Milestones and Escalation Rules are two features that need to be configured as part of the entitlement process implementation. Milestones are time-dependent steps that represent required service levels, such as first response time or resolution time. Escalation Rules are actions that occur when a milestone is violated, such as sending an email alert or reassigning the case. Verified References: : Milestones : : Escalation Rules