According to the article case "Digitization of an Industrial Giant: GE Takes on Industrial Analytics by J. Stewart Black, Professor of Management Practice in Global Leadership and Strategy, with assistance from Anne-Marie Carrick, both at INSEAD. It is intended to be used as a basis for class discussion rather than to illustrate either effective or ineffective handling of an administrative situation", ANSWER THE FOLLOWING QUESTION: Which of the following is NOT a benefit of predictive maintenance? a) Extending the life of equipment b) Reducing the need for unplanned maintenance c) Increasing revenue generated from the equipment d) Following a predetermined maintenance schedule at a fixed time interval