Capacity planning is not easy, it usually involves of understanding user journey and estimating the capacity needed from each subsystem from defined journey. W

Capacity planning is not easy, it usually involves of understanding user journey and estimating the capacity needed from each subsystem from defined journey. What interesting in this article is the way they simulate the journey on the load test, they created "mini" slack client and use that to simulate the traffic. Even tho they have shared the situation, I think they still able to simulate it by using usual api hit based tools and that would be much easier to maintain.