Dear friends, I have booked my travel tickets from Lokamanya Tilak to Guntur by train no. 17222 on 29th March 2015. PNR No. 8456564525, booking status GNWL 1, 2, 3. Till now the status is same. PNR predictions are 9/9 confirmed. I am qurious to know how these predication are made. Please respond as soon as possible.