In order to improve working reliability, increase grain mass, and achieve ignition and stage separation at the same time, a successful method is to apply an external igniter to solid rocket motor.

为了提高固体发动机工作可靠性，增加装药质量，同时实现二级点火和级间分离，应用体外点火器是一种成功的方法。

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If the marginal value that a customer receives for increased reliability is less than the marginal cost required to increase reliability for that customer, then a systemwide relocation of lines would likely lead to wasted resources.

WSJ: Should Utilities Be Required to Bury Power Lines to Protect Them?

Japanese companies (such as Mitsubishi Heavy) are working on a so-called clamshell nose cone that is supposed to increase reliability by opening outside the atmosphere and reducing the number of maneuvers required to hit an incoming missile.

FORBES: Magazine Article

Japanese companies (such as Mitsubishi Heavy) are working on a so-called clamshell nose cone that is supposed to increase reliability by opening like a clamshell outside the atmosphere and reducing the number of maneuvers required to hit an incoming missile.

FORBES: Magazine Article