Every rep I have spoken to has said that the ratio requires DCI to shrink and is not intended to force mainline to grow. DCI shrinking by almost 25% even if we don't grow looks pretty good to me. RA is directly quoted "We would mostly use them to replace inefficient 50-seat regional jets." It might be a stretch but my maths say you can't replace 50 seat block hours with 717s AND maintain your graph ratios showing mainline NOT growing AND DCI shrinking 24,7%??? Every other poster has said RA doesn't lie. Either the business plan is to replace 50 seat lift or it's a trick. Either way your graphs seem to proof in a worst case scenario that DCI shrinks in block hours and planes.