As it was exploring new avenues of growth, McDonald's core burger chain had become plagued by problems. Most prominently, the Made for You system backfired. Although many franchisees believed that it succeeded in improving the quality of the food, it also increased service times and proved labor-intensive. Some franchisees also complained that the actual cost of implementing the system ran much higher than the corporation had estimated, a charge that McDonald's contested. In any case, there was no question that Made for You failed to reverse the chain's sluggish sales. Growth in sales at stores open more than a year (known as same-store sales) fell in both 2000 and 2001. Late in 2001 the company launched a restructuring involving the elimination of about 850 positions, 700 of which were in the US, and several restaurant closings.