How to tell that a Siebel service is completely started using PowerShell script

 Hi gurus,I already have a running PowerShell script(s) to start and stop Siebel services with a constant time delay between them just to be sure not to start a service before the other (business wise)

The problem is that I need a "dynamic" way to determine if a service is "completely" started or not via script (not using Sleep xx)

Manually, I make sure it is completely started by watching the CPU consumption which raises up to 100% for a few seconds, then comes back to normal.

By the way, Windows OS returns that service is running, but actually it is not "fully" started.