The AT&T case study exemplifies the impact of instructional design in streamlining training programs. Initially, a 45-day course for Long Lines craftsmen caused disruptions due to lengthy classroom time away from work. Through task analysis, instructional designers identified and eliminated irrelevant content, reducing the course to nine days—a remarkable 80% reduction. Despite an initial cost of $350,000, the revised program saved $37 million over five years. This case underscores the importance of focusing on learners' essential needs and skills, rather than nonessential content, to optimize training outcomes and achieve cost-efficiency.