What are the top 4 issues that one should research before making the HR outsourcing decision in an organization

Question

I don't know what your book says -- but it seems to me that the top issues are:
1. Will the outsourcing provide the same or better service for the company's customers?
2. Will the outsourcing be less expensive than the same work done in-house? All costs should be considered.

This site may be helpful.

http://en.wikipedia.org/wiki/Outsourcing