When writing test cases, you should follow the following guidelines:

• Assess the project's risks and deadlines before planning and prioritizing test cases and write accordingly.


• Keep the 80/20 rule in mind. For the best coverage of your application, 20% of your tests should cover 80% of its functionality.


• Make sure you don't try to test all cases at once, but rather improvise them as you go.


• Create a list of your test cases and categorize them according to business scenarios and functionality.


• Modularity and granularity are important when designing test cases.


• Provide test cases in a way that can easily be understood by others and modified if necessary.


• Remember that the software designed is ultimately for customers, so keep their requirements in mind.


• Manage a stable release cycle by using a test management tool.


• Keep track of your test cases on a regular basis. Test cases must be unique and irrelevant or duplicated must be removed.