It's sad, but not Birds Eyes fault, if they have lost this Italian contract, they cant be expected to buy the raw materials. As morddwyd says, a supplier needs to split their production amongst as many customers as possible, to protect against this quite common problem. Unfortunately if the supplier has few lines, this can be very difficult.
I used to have some peripheral involvement with the pea picking operation and it really is conducted with military precision by Birds Eye.
The field officers regularly inspected the crop and reported back to the operations control room at the factory. The picking machinery was moved from field to field and farm to farm at the absolute optimum time, day or night and the peas were then harvested and transported to the factory, which was within 10 miles of the growing area and frozen within a couple of hours.