An official statement stated that BEST being a consumer of Tata Electric Companies, which is a part of the western grid, the failure of any major equipment in the grid due to the Y2K problem can cause a grid failure which may affect BEST consumers too. But due to the very nature, complexity and interdependency of the Y2K problem it may not be possible to say with 100 per cent certainty that no eventuality will take place at the time of the millennium changeover, the release added.