Hi vilas,
"In 2012 Airbus reported several in-service occurrences that drove a need to make changes to automation to ensure that aircraft did not take off with less than the required thrust (Airbus Industries, 2012). Despite the current system providing a warning to pilots that:
“ENG THR LEVERS NOT SET”
With the expected pilot action to simply advance the thrust levers from FLEX/MCT to Take-Off Go-Around (TOGA) position (Fig.3), this was not occurring and now the system will automatically give TOGA power after 8 seconds."
See FCOM PRO-ABN-70: ENG THR LEVERS NOT SET.
Some humans' flawed logic defies Airbus logic - the fact that there is not a separate "TOGA" button to press. The TOGA button logic is incorporated into the TLs being advanced to the TOGA position or the FMGCs having been programmed correctly and in the Take OFF mode with "FLEX" inserted and TLs set to MCT gate.
From Human_Error_to_Complexity