Six Sigma and Reducing Recruitment Costs?

I have read a number of threads on this board that touch on the subject of the impact of Six Sigma on the cost reductions and process improvements that can be made in the non manufacturing areas of a business. It seems to me that whilst we are constantly trying to nail our suppliers and improve manufacturing processes in order to reduce time, waste, stock holding or improve our JIT environments we are ignoring one of the major things that hits our bottom line - that of our inability to recruit the right people at the right time with the right skills in the right geographical location. I know HR don't keep a list of people that are begging to work for us, but why does it seem to take so long and why are the people that are put forward to us so poor? Can anyone out there suggest an improvement that has worked for them?

Arrann.