Dear Dimple,
I read your reply to my posting. In fact what you need to do is to create well-designed recruitment manual. In this manual you need to mention Job Description, qualification, experience, skills, knowledge (mandatory desirable) etc. With this being done, posting job-listing whether internally or externally will become too easy.
For internal candidates in addition to all other factors, you need to consider the scores of Performance Appraisal too.
Giving second promotion in short span to particular person sounds good but there is another angle to look at too. Other employees should not construe it as favouritism. Their misinterpretation may give birth yet another problems.
As far as my personal view concerned, I am not in favour of second promotion in such a short span.
Thanks,
Dinesh V Divekar