All throughout history, persons have always had their level of competency in various areas (academic or not) tested, measured and evaluated. Today, this is no different. Up till now, there has been no set assessment hierarchy for assessors to follow and attain some level of understanding about the processes of Assessment, Measurement and Evaluation. This book presents a brief overview of an assessment hierarchy (to be significantly researched and developed further) as proposed by the Author which he hopes to serve as a guide so that assessors can build their practices upon. Additionally, the book gives an insight into the procedures followed to developing a science test (using a table of specifications), administering, as well as analyzing and reviewing that test via intricate statistics such as calculating difficulty indices, discrimination indices, etc. of the test items used in order to decide to accept or reject test items. Furthermore, decisions on the test items and the test in general as well as the rationale for the test modifications are presented in this book.