1999 FastGrowth Firm Survey of A/E/P Environmental Consulting Firms Author:Zweig White, Associates The Fast-Growth Firm Survey is a compilation of information from several Zweig White & Associates 1998 management surveys. Its purpose is to highlight what the fastest-growing firms in the industry (average annual revenue and staff growth of more than 20% for the past three years) are doing with respect to various areas of management.