Currently there are two different Accounting methods in M3.

Perpetual, frecuently used in countries following anglosaxon Accounting principles (US, UK, etc) and Periodic followed in countries using French Accounting principles (France, Spain, Belgium, Italy)

This article shows the impact on the Accounting set ups and the transactions impacted (PO, DO, CO, MUC).

This article shows which Accounting set ups are used on each accounting method.

Remeber the Accountin gethod is defined in CAS900, and it is a critical setting for the management of Inventory and  GL postings 

Please, see the presentations attached tothis link so you can see the T Accounts for each method, and the impact on the P&L account.