What is yield ratio and what according to you will be yield ration for a BPO industry?

What is yield ratio and what according to you will be yield ration for a BPO industry?

•The ratio of attracted applicants for a job opening with the number of finally hired people at a point of time is yield ratio.
•For a BPO industry if 100 candidates have been contacted, 60 will come for interview, 40 will be shortlisted, 30 will come for training and 15 will finally join the organization.

If we asked you to design recruitment strategy for hiring 15 software engineer for an IT company, what will be your strategy?

?
•Employee referral-20% (3)
•Old database- 20% (3)
•Campus recruitment- 60 % (9)
•To recruit software engineer we can prefer above 3 recruitment strategy which will finally full fill the requirement and it will be less expensive.