PRD - PRA transaction Key

Dear All,

I hav one doubt regarding transaction key PRD - PRA.

When actually it hits . I think it is used while using goods issue and other movements.

But tell me the functionaly of it.

Also I found in OMJJ for movement type 201,221 posting like

PRD PRA and check box is unticked (a/c assignment)

Why is it so?

Pls clear my doubt.

Thanks in advance.

Regards,

Gitesh