The ISTR, short for Initial Sample Test Report, is a form in which a supplier documents the results collected during the inspection of first articles. This is a central requirement from the customer. The aim is to ensure that the quality of the first articles, i.e., the products manufactured during the test run of a new series production, meets expectations and that the specifications have been realized. The ISTR includes, among other things, contact details and product and inspection information, a table of contents (e.g., core data, details about the equipment, and comments). The inspection results primarily include the inspection tools, target and actual values, and the customer’s decision.