What to do when the test cycle is compressed in an emergency

This is a typical time management problem in project management, which can still be managed by applying the method of project management during testing.
Generally encountered this problem, the first thought is to mention the risk, the risk as the highest level to report. And with the stakeholders left to communicate right to communicate, hope to win more time, hope to get the test cycle due.
The results are generally risk reporting, and the leadership knows that there are no instructions, that is, according to the established policy. The head of the test was in a bad fight and had no extra time to fight.
But the test has to go on, what can I do? Can also do, overtime Bai, do not finish also bite the bullet on Bai, otherwise what can do?
Here I am not saying don't report risk, don't try to communicate. But risk and communication do not enough, need other means to actually settle this dilemma.
There are a number of methods, generally there are two methods: Rush and quick follow up. This is the method directly mentioned in the project management;
The rush is obviously overtime, with extra work to get more output. It's time to pay attention to working overtime on critical paths, or you may fall into the bottomless pit of overtime.
Quick follow-up is to shorten the bridging time for each sub-task, and to schedule simultaneous tasks to speed up the start of the test task, as well as to end the task early.
There are also add people, the problem of adding people do not need to say more, I believe we also understand.
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The following comes from personal experience:
In management, the most delaying progress is the waste of time, especially the management of the waste of time. If you can reduce the waste of time, can greatly improve the work output.
This is the project team's internal communication and external communication, task scheduling unreasonable waste of time is more obvious.
In an emergency, the most important I think is still need to strengthen control, efficient communication, so-called busy to get confused.
The more urgent the need for a strong leadership to lead the team, reduce the time wasted, make the work more effective to tide over the difficult situation.

What to do when the test cycle is compressed in an emergency