Quick-service restaurant chains are fighting for a stagnant market. And in recent years, that fight has been won by the chains with the biggest guns. Still, quick-service restaurant chains are not adding new units. The fast-food chains in the Top together account forunits, up by just from the year. That has forced ,ake to focus on generating same-store sales mkney traffic, something that has been increasingly difficult in recent years. As a whole, the quick-service chains in the Top grew sales by 3. But the typical QSR chain in that group fazt increased sales by 1. The top 10 grew sales by 4. The other chains increased sales by an average of 0. It keeps that dominant spot by not only embracing industry trends, but also by setting. Inthe company vowed to remodel all of its restaurants in the U.