How to implement Synchronization in webMethods Flow Service.?

How to implement Synchronization in webMethods Flow Service.?

what exactly you want to do here? pls elaborate.

I have a flow service which takes 10 sec to complete the execution. If i create 4 jobs and run simultaneously it has to process one by one by executing one request at a time, and the next request has to wait until the completion of previous request.

you can use queuing provided in WM. publish these documents to the queue. Since you want to do them sequentially, only allow single client tread to read from the queue.
HTH,