Dear Experts,

I am writing my GMAT in October with an ultimate aim to pursue a PhD in Decision Sciences.

I am an Engineering Graduate from India with a good academic record and a work-ex of 4 years which is into Manufacturing and IT-ERP.
With no work-ex or research papers to my credit, should I first take an MBA and then get into the PhD program or I should directly try for the PhD Program ?
What are my chances of getting into the PhD program directly ?

Please suggest.