Visioneers base their imaginings on detailed engineering studies and technical designs.

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"The in-depth assessment confirmed the basic vehicle concepts of the SLS, allowing the team to move forward and start more detailed engineering design, " Gerstenmaier said.

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The Royal Society for the Protection of Birds, which recently met Hafren Power together with the Angling Trust and other green groups, is also reserving its judgment until it is able to see and assess detailed engineering plans for the barrage.

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NASA's traditional approach has been to invest heavily in detailed systems engineering, computer simulations and extensive analysis through the early stages of major projects.

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"In this context much activity including further detailed pre-construction engineering work will continue ahead of the later construction phase, " it said in a statement.

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Cody Ray, President of the Drexel Smart House Group, who is currently completing his BS and MS in Electrical Engineering, detailed the many projects that he and other students across disciplines have played a role in developing and executing.

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Its engineering snafus are detailed, its engineers called to the stand to rationalize how they could have been so careless.

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