fig3
![Will robot-assisted minimally invasive esophagectomy improve patient outcomes compared to conventional minimally invasive esophagectomy?](https://image.oaes.cc/a7a9ebe5-e3ad-4844-a40b-bda5bb75dba9/mis-2023-15.fig.3.jpg)
Figure 3. The CUSUM plot of console time. A plateau was reached after the 29th case, followed by a further decrease after 43 cases. Therefore, we defined the period up to the 28th case as phase I, the period from the 29th-42nd cases as phase II, and the period after the 43rd case as phase III.