mission time meaning in English

持续运行时间
完成任务的限定时间

For particular mission , we give the condition based maintenance policy on optimizing cost , availability and mission reliability in mission time
对特定任务的视情维修策略，给出了任务时间内以任务可靠度、可用度、费用为目标的维修策略求解方法。
You can even have this be a selectable option for the mission , so that the players can decide on the mission time before starting the mission , adding that much more replayability to it
你甚至可以为任务设置一个时间选项，以便玩家可以自己决定任务发生的时间，这样可以增加任务的可玩性。