Each Partner Tier has a set of requirements to be met to progress into the corresponding Tier.
One of the key requirements is to complete solution competencies by a certain number of resources from Partner organization. The solution competency can be a certification path as chosen by the Partner, for example: Data Centre Visualisation, Cloud Management and Automation, VMWare Cloud on AWS, etc.
Secondly, there is a Tier credit score associated with each Tier. The score is calculated based off factors such as transacting revenue, target market, transacting territory, etc.
For more details, please refer to page 23-33 of the Partner Connect Program Guide.