This guide is intended to provide vocational administrators with general information about the current state of competency-based test development and specific information about selected products and services that are available or under development. The general information section deals with the types of test products and services that are available (occupation-specific tests, item banks, cognitive tests, performance tests, affective measures, and scoring services), access options (purchase, cost recovery, exchange, consortium membership, testing services, and restrictions), criteria for selecting tests (validity, reliability, criterion-referenced format, appropriateness, currency, local relevance, and convenience and usefulness for local purposes), and procedures for obtaining information (contained in computer databases and print-based resources) about products that are not included in the guide. Specific information is presented in the form of source abstracts describing currently available products and services and an occupation index that cross-references test titles and sources. (MN)