This guide is intended to assist states and service delivery areas (SDAs) in addressing the new oversight responsibilities and opportunities stipulated by the Job Training Partnership Act (JTPA) with respect to planning and conducting a gross impact evaluation. The following topics are covered in the individual chapters: introduction and overview (reasons for studying gross impact, a quick map to gross impact analysis, and issues underlying gross impact analysis); research design (designs for participant and employer follow-ups and summaries of recommended employer and participant designs); measurement (issues underlying interpretations of JTPA intervention, participant measures, and employer measures); and analysis procedures (analyzing various types of measures, estimating change, analyzing a large number of potential influences on outcomes, and combining data from different sources). The section of research design for a participant follow-up contains detailed guidelines pertaining to demarcating alternative levels of investment in the analysis of participant outcomes, identifying the population to be analyzed, designing and selecting the sample, deciding what follow-up period to use, and using different data collection methods. Appendixes include a review of selected literature, background to gross impact analysis methods, information on selected implementation topics, illustrative applications, and selected measurement instruments. (MN)