Report error qty AX2013


any idea of the use of error qty?

when i report as finished in my production order i can report certain qty as error quantity, and i can also specify the cause of the error “material, machine … etc”

what is the use?

in the inventory on hand there is no “error qty” field

there is no warehouse for “error” item

i cant see any use of this error qty nor error cause.

anyone knows any report, function, parameter … anything related to the error qty?