The Purpose and overview section of the architecture design includes the Executive summary section. The Executive summary section provides a high-level overview of the design and the goals the design will accomplish, and defines the purpose and scope of the architecture design document.
The following is an example executive summary in the Cloud Infrastructure Architecture Case Study White Paper:
Executive Summary This architecture design was developed to support a virtualization project to consolidate 100 existing physical servers on to a VMware vSphere 6.x virtual infrastructure. The primary goals this design will accomplish are to increase operational efficiency and to provide high availability of customer-facing applications. ...
