Prakriti is an important concept of Ayurveda that explains individuality and has role in prevention, diagnosis and treatment of diseases. It expresses unique trait of an individual that is defined by specific and permanent composition of Dosha right from birth.
Diagnosis in Ayurvedic system of medicine can not be complete without defining the constitution of an individual. Because treatment differs according to Prakriti of an individual. Ayurved believes in Medicine for an individual person and not for an individual organ or system.
The E-book "AYURVEDIC PRAKRITI"(Your Dosha-Constitution & It's Significance to You) is a complete and comprehensive guide on the subject.