We have released some great Lync KHI guidance and resources. These resources include a KHI analysis workbook and KHI Guide.
Key Health Indicators - Analysis and Definitions Workbook - excel workbook that will help analyze and crunch KHI collection data.
Key Health Indicators Guide - this guide provides a sample process to operationalize, covers how to the use the Analysis and Definitions Workbook and provide next steps for remediating identified areas of concern.
KHI Feedback - LyncKHI@Microsoft.com