It often happens that there is a large software suite, but you have no time left to check or test each module as thoroughly as you want. Even if you have your test cases ready, it might get challenging to put them all to the test for unavoidable reasons. In such cases, the right thing to do would be to prioritise the tasks. You can create a priority list rating the tests from highly significant to least important. It will solve time or budget constraints, and you can only run the most vital tests. Moreover, you can also ask your client to share a list of priorities with you based on the tasks they consider significant to test. So, you can run a test for those, ensuring the features and functionalities that are vital for your client get tested thoroughly. Moreover, you can decide to deliver the software after selective testing and do the rest of the software testing afterwards. This way, you can save some time and ensure timely software delivery without compromising its quality. Furthermore, you can test the rest of the functionalities late during the process to ensure you even verify the lesser significant features.