I'm trying to understand the order process in Magento 1.7. The background is: I'm extracting the payment (and later the complete checkout) from Magento to another system, but the order processing should take place in Magento. So, I need to understand, at what places in the process I can / need to define interfaces to my other application.
I expected to find quite quickly a workflow diagram for the order process, including also the payment. But could not find anything so far, what would be more or less complete and contain payment.
What is the order process workflow (only for/with the Magento standard statuses), including the payment, in Magento 1?