Answer:
Holacracy
Explanation:
According to my research on different organizational structures, I can say that based on the information provided within the question the type of structure being used is called a Holacracy. Like mentioned in the question this is a method which focuses on self-organizing teams who each have authority within the company, while at the same time ditching traditional management hierarchy's. Which is exactly what Tiffany's Tea has implemented.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.