What is the use of Accrue Expense Items option in Manage Common Option for Payables and Procurement

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What is the use of Accrue Expense Items option in Manage Common Option for Payables and Procurement.

Because although the Option ""Accrue Expense Items"" is marked as ""Period End"" in default the Accrue at Receipt option is marked as ""Yes"" while Creating a Expense Destination Purchase Order.

What is the use of Accrue Expense Items option because any way you are supposed to change the option at PO Level??.

Thanks & Regards,

Sai Kumar.

Version (include the version you are using, if applicable):22A

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