hi sharma ji
as aditya said, it depends on your application and supporting docs provided with application.
you need to contact your MP regarding status of your application. you need to get info about eligibility and background/security checks. as you know, they have a straight and simple way of processing.
after file transfer they send PPR and review your application to pass eligibility checks. if they have any doubts about relationship, they request additional docs or interview. after eligibility checks, they update your ecas to "in process" and start BC/SC (it takes only few days, if you have no travel or work history). BC/and SC took only 2-3 days for me and i have 1.2 years travel history and 1 year work history.
in your case it looks like, they are still working on eligibility checks :-X contact you MP and let us know
good luck