In Hadith terminology, we come across terms such as thiqa (trustworthy), mutqin (convincing), 'adl (just), sad¿q (veracious), matr¿k (abandoned), da'¿f (weak) and so on. Each of these terms is used to denote the level of the reliability of a transmitter (r¿v¿) of Prophetic Traditions. And there is another group of terms such as sah¿h (sound), hasan (good) and da'¿f (weak). When any of these terms are predicated of a Prophetic Tradition, they indicate the proportion of probability of whether a supposed prophetic tradition actually belongs to the Prophet. Examining prophetic traditions, scholars studying prophetic traditions took into account the consistency of transmitters in general terms and all different chains of transmission of a prophetic tradition. In this book, I propose a model to determine numerical values of classes of transmitters and of properties (hukm) of prophetic traditions. It will also to help us identify the most probable form of any prophetic tradition.