EDS missed a key deadline on a £50m software design project after twice rescheduling and putting back completion by two years.
The IT outsourcer and its customer National Air Traffic Services last week issued a statement which admitted that work on an air traffic control software upgrade at Prestwick, Strathclyde, has been suspended but gave no reason.
However, Computer Weekly has learned that the suspension was prompted by the outsourcer's failure to hit a key milestone.
It was initially intended that the project would be completed by the beginning of this year. However, it was extended first for another 22 months and then for a few months more to accommodate changing specifications.