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Rather than emphasizing certification of the enduring specifications required for confident remanufacture , however , DOE 's preferred strategy emphasizes using the waning asset of test-qualified personnel in what amounts to a crash program to develop and validate new three dimensional simulation capabilities , capabilities that DOE hopes a new generation of U.S. designers - - but no one else - - will employ , ostensibly to optimize requirements for remanufacture by predicting when materials aging will degrade weapons performance , but more plausibly to implement future changes in the nuclear explosive packages of stockpile weapons . NRDC Comment : Rather than relying on a costly , technologically complex , politically provocative , and ultimately uncertain program to reproduce capabilities for exercising " designer judgement " in future generations of weapons laboratory personnel , NRDC believes that DOE should use its waning asset of test qualified personnel to certify the specifications for " standardized , " indefinitely producible configurations of a limited set of current stockpile designs , specifications that would then be rigorously adhered to , to the maximum achievable extent , in order to minimize future changes to , and performance uncertainties in , a future stockpile of perhaps a few hundred weapons .