Where Is lot expiry date setup in OPM Item in 11i?

 Hi

In our case we have define following setup in OPM item master through Additional Information.

Retest Interval, Shelflife, Expiration Interval .

for some items and these items expiry date come automatic while creating a new lot.

But in some items we have unable to define above setup in OPM item master because the Additional Information disable. But these items expiry date also automatically come while creating a lot. So We want to find out where is the setup for these items.

We also check profile option GMI: LOT EXPIRY INTERVAL  at  site level but this setup is also blank in profile option so pl. advise or help.