It has become increasingly important for clinical laboratory scientists in general, and clinical microbiologists specifically, to assess the impact of pre- and post-analytical factors on the medical value of the laboratory tests. However, laboratorians traditionally feel most comfortable with the scientific and technical aspects of diagnostic assays and instruments — the so-called analytical component of laboratory testing. They have been specifically trained in making critical observations, analyzing comparative test data, assessing overall test efficiency, and based on these criteria, making recommendations about the best test method. While a thorough evaluation of such analytical and technical components of testing is necessary, it is not sufficient to ensure that the test will be ordered when appropriate and its intended use and limitations understood and applied by the clinician. As an aid to management of test utilization, clinical microbiologists must become thoroughly familiar with the processes involved in specimen and test information and data management in their own clinical settings. These processes relate not only to ordering of tests and transmitting the order to the laboratory but also to communicating the end product — the information included in laboratory reports. Today's clinical and laboratory information systems generally provide great flexibility in how laboratory tests are formatted on computer order screens on hospital units and in how laboratory test reports are displaced and appended electronically and in print form. Informative comments and textual reports are particularly valuable to aid the clinician in patient care, because they augment and clarify simple culture results, as well as positive-negative, semiquantitative, and numerical data.