The conclusion of the 17-month inquiry cited dozens of failures on the part of BP and other companies...BP said it “agrees with the report’s core conclusion – consistent with every other official investigation – that the Deepwater Horizon accident was the result of multiple causes, involving multiple parties, including Transocean and Halliburton”. Transocean said: “The report confirms that the primary cause of the incident was the catastrophic failure of the cement in the Macondo well.” Halliburton said the report incorrectly said it was responsible for operational decisions. “Every contributing cause where Halliburton is named, the operational responsibility lies solely with BP,” it added...BP, as the leader of the project and “ultimately responsible” company, came in for the strongest criticism in the report. The inquiry team argued that “as a prudent operator, BP should have [had] complete control of operations and issues surrounding operations on its lease”.