Tech products get delayed all the time, but Apple's recent acknowledgment that the next generation of Siri is delayed -- with no timeline beyond "in the coming year" -- is uncharacteristic for the typically secretive company.

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.

As Apple's Siri comes under attack for failing at the most basic queries, the company is shaking up leadership in charge of Apple's AI features for Siri.