These imperfections led to an increase in the number of exception messages that would have to be dealt with and which in turn would lead to more call backs and enquiries . In particular the decision on that day to use only the computer generated resource allocations (which were proven to be less than 100 reliable ) was a high risk move -the CAD system implemented in 1992 was over ambitious and was developed and implemented against an impossible timetable -in purchasing...











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