How is safety stock calculated in replenishment planning

Summary:

I have gone through oracle documentation for safety stock calculation. But it does not give details about the actual formula used for when the statiscial method is selected.

Existing documentation : https://docs.oracle.com/en/cloud/saas/supply-chain-and-manufacturing/25b/faurp/how-safety-stock-is-calculated-in-oracle-replenishment-planning.html

I wanted to understand
1. Does the statistical formula consider supply (lead time ) variability. If no, is this feature on product road map?

2. What is the time window to calculate average demand

3. Will the system automatically update MAPE and intermittent demand flag for items?

4. Actual formula used for calculation

Any whitepaper in this area would be help ful