Update valet-forecast-lab.md

azure_devops/valet-forecast-lab.md

@@ -1,3 +1,37 @@
-# Forecast Azure DevOps to GitHub using Valet forecast command
+# Forecast Azure DevOps usage using Valet's forecast command
+In this lab we will use the `forecast` command to forecast potential GitHub Actions usage by computing metrics from the historical pipeline data in Azure DevOps.  The metrics will be stored on disk in a markdown file and include job metrics for execution time, queue time, and concurrency.  We will look at each of these metrics in more depth later in this lab.
 
-### Coming soon
+- [Prerequisites](#prerequisites)
+- [Prepare for forecast](#prepare-for-forecast)
+- [Perform a forecast](#perform-a-forecast)
+- [Review forecast report](#review-forecast-report)
+- [Forecasting multiple providers](#forecasting-multiple-providers)
+- [Next steps](#next-steps)
+
+## Prerequisites
+TBD
+
+## Prepare for forecast
+
+## Perform a forecast
+
+## Review forecast report
+  
+### Metric Definitions
+|  Name | Description |
+| ----- | ----------- |
+| Median | The __middle__ value |
+| P90 | 90% of the values are less than or equal to |
+| Min | The lowest value |
+| Max | The highest value |
+   
+### Total Section
+
+
+### Runner Group Sections
+- The preceding sections shows the same metrics as the `Total` section, but are broken out into runner groups. A runner group is a logical grouping of one or more runners.
+
+
+## Forecasting multiple providers
+
+## Next steps