Sometimes Tester need common sense to test a application!!!

I am saying this because most of the times it is not possible to test the whole application within the specified time. In such situations it’s better to find out the risk factors in the projects and concentrate on them.

Here are some points to be considered when you are in such a situation:
1) Find out Important functionality is your project?
2) Find out High-risk module of the project?
3) Which functionality is most visible to the user?
4) Which functionality has the largest safety impact?
5) Which functionality has the largest financial impact on users?
6) Which aspects of the application are most important to the customer?
7) Which parts of the code are most complex, and thus most subject to errors?
Which parts of the application were developed in rush or panic mode?
9) What do the developers think are the highest-risk aspects of the application?
10) What kinds of problems would cause the worst publicity?
11) What kinds of problems would cause the most customer service complaints?
12) What kinds of tests could easily cover multiple functionalities?

Considering these points you can greatly reduce the risk of project releasing under less time constraint.