This book discussed the appropriateness of laboratory utilization in hospitals and the development of evidence-based guidelines which have increasingly become a familiar part of clinical practice and the impact of evidence based practice and computerized based system adopting to assist practitioner decisions about appropriate laboratory services utilization in hospitals.The book covered three main topics as follows: Topic One: The Appropriateness of Laboratory Utilization in hospitals.Topic Two: How Evidence Based Practice improve Laboratory Utilization in hospitals?Topic Three: Assessment of Evidence Based Practice & Computer-Based System to improve Laboratory Utilization in hospitals.