The same month he revamped the safety structure, Mr. Hayward said he would streamline BP.

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Two engineers who reportedly approved the safety of the structure have also been detained.

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Savings have been achieved through "reduced corporate overheads and a simpler corporate structure, " he said, not by economizing on safety.

WSJ: As CEO Hayward Remade BP, Safety, Cost Drives Clashed

On the governance side, Umicore has a more equitable compensation structure than most of its peers, coupled with above-average health and safety performance and employee turnover, he adds.

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It also improved the structure so that the van can get top marks in the Insurance Institute for Highway Safety's new frontal crash test, which hits a fixed barrier at an angle.

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Project bosses said their safety checks showed more work is required on the complex 2, 000-tonne structure.

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The new structure will place construction and the management of services under the new China Railway Corp, while safety and regulation will come under the transport ministry.

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