Every first of each month I execute the following transaction in SAP:
• CO43 calculated the surcharges of Overhead on material and production
• KKAO calculates WIP changes
• KKS1 Variance calculation production orders
• CO88 Settlement of production orders
• KO8G Settlement of Service orders
Therefore, I run every month KKS1 for the calculation of production order variances.
In KE30 you can see for TH10 if the variances have been booked for your entity. I checked them and for May and June there have been variances booked (picture below in EURO).
Therefore, there is no need to run KKS1 again.
Please check yourself with KE30 in THB so that you get familiar with the figures.
If you have questions, please let me know.