Thank you Karioca.
I got a Bridging Open Work Permit a month ago.
My timelines are here.
Application of PR
May 22, 2012 Application received (under CEC)
Sep 20, 2012 AOR received
Jan 23, 2013 Medical requested
Jan 31, 2013 Medical done
My previous work permit was scheduled to be expired on 1 March 2013.
Application of BOWP
Dec 25, 2012 Applied BOWP on-line
Feb 14, 2013 Requested the offer of employment
Feb 15, 2013 Uploaded explanation letter (Why I don't need to provide the offer of employment)
Feb 28, 2013 No response from CIC office even though the normal processing time was passed
Feb 28, 2013 Made a phone call to CIC call centre
Agent told me my work permit was issued on Feb 25, 2013 and will be delivered
Feb 28, 2013 Found it was delivered (Issued: Feb 25, 2013, Valid until: Feb 25, 2014)
In my case, it was sufficient to apply BOWP with AOR received.