A) Indian Railways measures the delay or on-time information of a train, basis estimated time of arrival(ETA) at the next stop. We follow the same analogy. So as an example if you see that a train is running late by 30 minutes at RailYatri, it means that the train is estimated to reach delayed by 30 minutes on its next arriving station. However, it can cover up this delay on the remainder of stations. Thus, we recommend our users to look at the estimated time of arrival(ETA) at all upcoming stops and also to check train running status from time to time.