This is not a real research and it is based on current data only. Data study from 2005 to 2017 shows 1. 12401/12402 Magadh Express 2. 12873/74 Jharkhand Exp 3 . Mahananda Sikkim Exp 4.13007-08 Toofan Exp are worst train to use. In new list 1. Swatantrata Senani added , it has been running late since 2013 not before that. Above mentioned train are running late on daily basis. 12331/31 Himgiri exp record is not too bad now.
Ixigo has taken the data during winter and publicized. Report is partially true.