Could I run some jobs in my specified order?

Yes. You can do it by "Workflow" or "Request Connection Function".

Please see the following manual 7.Workflow an 1.2.22. Request Connection Function about how to use.
NQSII User's Guide

The different between Workflow and Request Connection Function

The different is the timing of running request. In the case of Workflow, all request become an object for assign immediately after submitting. In the case of Request Connection Function, next request become an object for assign after the previous request finished . Therefore, you should choose the workflow, if system is crowded,.