The document discusses using SERVQUAL, a model for measuring service quality, to evaluate and compare the performance of fast food chains on key customer service dimensions. It analyzes four fast food chains (Dominos, KFC, Subway, McDonald's) based on the five SERVQUAL dimensions of reliability, responsiveness, assurance, empathy, and tangibles. Across all dimensions, KFC had the largest average gap score, indicating the greatest difference between customers' expected and perceived levels of service quality compared to the other chains.