For decades the corporate HR department was perceived just as a back-office function, a cost center focused on mundane administrative tasks such as managing compensation and benefits plans. But very recently when Leena Nair was given the jump from a CHRO to a CEO, so do you think that Nair's stellar rise is a one-off, or does it indicate that organisations are now becoming increasingly open to the idea of CEOs from the HR domain? And are HR chiefs ready for the transition to the top job?