Quantifying Hr Practices

Hi to all,
This is Irfan I want to know how exactly we can Quantify Hr practices in terms of numbers. Is there any method available to do this, or can anyone suggest me some references where I can find the solution to this question.
This is the biggest Question for whole HR community on how to Quantify our work.
plz share with me your valuable knowledge.
looking forard towards your response.
thank you
Irfan

Dear Irfan,
I would like to put things this way
"If something exists it exists in quantity.
If it exists in quantity it can be measured."

Performance appraisal : In this case ,it is measured used various tools like 360 degree.
Recruitment & selection : Here the outcome of an test or interview is converted in to a quantitative form like ratings or score
So i believe all the HR practices can be quantified.
Durga

Hi
You can't improve what you can't measure.
So metrics must be developed based on the priorities of the strategic plan, which provides the key business drivers and criteria for metrics that managers most desire to watch. Processes are then designed to collect information relevant to these metrics and reduce it to numerical form for storage, display, and analysis. Decision makers examine the outcomes of various measured processes and strategies and track the results to guide the company and provide feedback.
Irfan Balance Scord is the method you can use.
Regards