Plannable Qty of 9999999.99 indicates that the Due Date on the row is beyond the lead time, so there is infinite quantity plannable. You can satisfy any demand for this date.

@matt.watters 

I also have a question about Plannable.

In Inventory Part Availability Planning window, there are 2 columns,

    Plannable

    CO Plannable

What are these 2 column difference? Thank you.

@ronhu the CO Plannable column uses the Expected Lead Time in its calculation while the Plannable uses the Purchasing/Manufacturing LT shown in the header.

@matt.watters I see, that is what ATP represents, make very much the sense. thank you very much.