This document is a summary and evaluation of the methodological procedures and results of the full-scale implementation of the Beginning Postsecondary Student Longitudinal Study, 1990-92 (BPS). The BPS starts with a cohort of students beginning postsecondary education regardless of when they completed high school. As a result, information will be available about nontraditional students who have delayed their postsecondary education. Many educational policy questions can be addressed through information gathered by the BPS about student characteristics and patterns of information. An introductory chapter provides a summary of the background, major procedures and results, and scheduled products of the survey. Other sections cover the design and method, data collection and results, data analysis, nonresponse weighting, and data file construction. Eight appendixes provide technical information about survey conduct. Six figures and 57 tables present some survey findings and details about the methodology. (SLD)