But the evidence that splitting the chairman and C.E.O.
Secretary Gates said that splitting the contract would also add to the costs of training crews and buying spare parts.
Mr Granger concludes that splitting the project up regionally has made it more resilient, as he had hoped.
But he added that splitting the role could create more problems than it solves, by adding to the management upheaval.
The defenders of fusion point out that there is no solid evidence that splitting the two jobs does any good.
Jenkin said: "The committee warned that splitting the roles was unlikely to be a durable arrangement, and Sir Bob has had to face some exceptional challenges.
A year after South Sudan celebrated its independence, there are few indications that splitting up the warring regions of Sudan has created lasting peace.
Another occurs when embryonic cells are so committed to their eventual body parts that splitting into identical-twin embryos is no longer possible.
Some gardeners have success with division, but there is a good chance that splitting the clumps will reduce your supply instead of increasing it.
Even Mr Prescott, a super-loyalist, says that splitting his old department was a mistake.From that weak position, the deputy prime minister must fight off his critics.
One night, a couple seated nearby did just that, splitting a Caesar salad, having one substantial small plate apiece and then sharing a dessert.
