Some of the panel's conclusions appear more critical of BP, the owner of the well, than preliminary findings issued last week by the presidential oil spill commission.

That commission said while BP made decisions that saved time it found no evidence that employees consciously chose saving money over safety. The National Academy of Engineering, which issued the latest report, said BP and others involved in the disaster failed to manage risks and didn't even have a system in place to weigh safety against costs.

Several entities, including the Coast Guard, the Justice Department, Congress and BP itself, also are looking into the causes of the worst offshore oil spill in U.S. history. [ YAHOO NEWS ]