[!tag=NNS] □ □
[!tag=NNS] □ □ □
[!tag=NNS] (□ | □) □
In the past , engineers gradually acquired expertise in those techniques that are most useful , but not necessarily in a systematic or thorough way . For example , while compiling , engineers inject an average of 0.60 defects per hour , while in test they inject an average of 0.38 defects per hour . Without specific guidance , engineers must work out the details of team-building and teamworking for themselves . In Hawaii , engineers at the Keck Observatory are using Java technology in a distributed user interface for their Adaptive Optics Project , a major application that will improve the clarity of the giant telescope 's images . In the past , engineers mostly ran the seating show - - and they put cost and safety above comfort and aesthetics . Apparently , engineers at the likes of Boeing and Goodyear have flocked to the workstation .