TD Magazine Article DEVELOPING CASE STUDIES BB By Bradford B. Boyd 0 Comments Bookmark Main Site Sign in Page Don't have an ATD account? Don't have an ATD account? Forgot your Password? Already an ATD customer without a web account? Institutional subscriber? Click here to sign in. Share Member-Only Content Outlines methods for writing cases to fit special training needs. Problems with writing the right case to develop a training principle; Material sources; Establishing a situation that illustrates the principle. You've reached ATD member-only content. Sign in below or join ATD to continue. Sign In