Bryukhanov stressed in various interviews that neither he nor his employees were to blame for the Chernobyl disaster, he claimed the accident was caused by "the imperfection of technology."[1][15] While the initial Soviet investigation put almost all the blame on the operators and management, later findings by the IAEA found that the reactor design and how the operators were informed of safety information was more significant.[16] However, the operators were found to have deviated from operational procedures, changing test protocols on the fly, as well has having made "ill judged" actions, making human factors a major contributing factor.[16]