Apple Inc. is undergoing a rare shake-up of its executive ranks, aiming to get its artificial intelligence efforts back on track after months of delays and stumbles, according to people familiar with the situation.

Apple is shaking up its executive roster as the company desperately seeks to make an AI product that works. According to Bloomberg, John Giannandrea, senior vice president of Machine Learning and AI Strategy, will no longer be in charge of Apple’s Siri and AI efforts.

Apple is shaking up its executive ranks to get its AI efforts back on track after months of delays, Bloomberg News reported on Thursday citing people familiar with the situation.