A task has come up: creating a new registration form with 10 fields to fill out. There could be many checks. How do you minimize the number of tests without significantly losing coverage?

To minimize the number of tests with a large number of fields and checks, test design techniques such as pairwise testing can be used. This method allows covering all possible pairs of field values, significantly reducing the number of test cases while maintaining good coverage of errors caused by the interaction of two parameters.

Example:

• Instead of testing all 10 fields with all possible values (which would result in a huge number of combinations), select key values for each field.
• Generate a set of tests where each pair of values from different fields appears in at least one test.

Ready-to-use tools for pairwise test generation include Microsoft’s PICT or AllPairs.

Additionally:

• Identify critical fields and checks, and cover them more thoroughly.
• Use equivalence partitioning and boundary values for each field.
• Automate tests to quickly verify different combinations.

This approach balances the number of tests and coverage quality.