I came across a post from a PowerShell MVP at happysysadmin.com blog about finding boot performance of Windows Client operating system with PowerShell. I liked this post alot because of very good explanation he provided about different parameters involved in boot and how to interpret them.
Worth taking a look.
http://www.happysysadm.com/2014/07/windows-boot-history-and-boot.html
Thanks @sysadm2010 for this wonderful article.