Re: Do i need to use MOM?

You don't *need* it, though you can certainly use it. If you prefer to build you own thing (possibly to avoid the extra licensing costs), then don't monitor the event log. Instead, create a service that listens to the MSBTS_ServiceInstanceSuspendedEvent event using WMI. There's a basic example of doing so in the BTS Documentation, and there are more complete several examples on the net you can find.