somewhat failure of 12037 due to poor planning by railway does not prove 12047 should run via PTI.
railway can take several steps to improve 12037
make it start at NDLS at 6:30 and reach LDH before 12029 Or start at 8 AM.
run time can easily decreased by 30 minutes
remove...
more... stoppage of TUN and DUI
extend till JRC/JUC