任何其他的情况都可能降低效率和增加成本、延长计划。
Anything else decreases productivity and increases the cost and schedule.
继成功的示范，DARPA的可选择延长计划追加18个月可以增加第二阶段合同价值。
Following a successful demonstration, DARPA has the option to extend the program for an additional 18 months which could increase the Phase II contract value.
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