Process Overview
The following video explains the process flow of sales order based production. Working with a configurable material, the configuration takes place inside sales order. This causes then an individual production order.
Production Order
Watch the following video, which gives you a detailed view on the production order.
Detailed Process View

In the standard system, you're allowed to make changes to sales order items for which production orders already exist.
Once the values assigned to a configurable item in the sales order have been changed, the production order is not automatically updated. (However, this can be implemented using assembly processing).
In a standard scenario, it's permitted to make changes to items in the sales order for which production orders already exist.
After a change has been made to the valuation of a configurable item in the sales order, the corresponding production order is not updated automatically. (However, this can be realized by assembly processing).
As long as no "Time Ticket" or goods movements have taken place for the production order, it's possible, via Read PP master data, to update the production order. The reading of the PP master data is also approved orders possible. The release is then withdrawn.
Once confirmations or goods movements exist for the production order, an automatic update is no longer possible. You can use OCM to support manual changes to production orders. This partially automates the process.