I have observed that I we have this value UNCHECKED  then If we Create an RMA (Linked to a Sales Order) , then while doing Receiving against the RMA , in the Receiving Transaction Form , List of Values on field
1.Start Serial Number
2.End Serial Number
should display only the Serial no. that we have shipped on the referenced?liked  Sales Order Number , but to my surprise , displays all the Serial Numbers of the Item that got Shipped on different outgoing sales Order line for a particular warehouse ( in which you are doing transaction).

But if you set the value for this Receiving Option as CHECKED , then while doing the Receiving against an RMA then it will show you only serial numbers that got shipped on the Linked/referenced Sales Orders for that RMA.

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