release strategy in purchse requs.

Hello to every body,

sir i m new to MM i want to know that how we can determine that a particular purchase requisition is having R .strategy or not.ALSO tell me that as i have created a simple P.requisition which is not having r. strategy so by customizing how can i assign this P.R with release st.kindly tell me steps of customozing.

REGARDS

RAJEEV CHATUEVEDI