Simple Testing – Add, Edit & Delete
Sometimes analysing what needs to be tested can be overwhelming, but I don't see this as such a big deal. I always start with what I see as the 3 key test building blocks Add, Edit & Delete and then expand and build on them. Too often I've seen some really complex test matrix created only for the most obvious tests to be overlooked.
By following the Add, Edit & Delete principle, you cover many bases such as data loss when saving and usability.
Once you've got these basics covered, then you think about other tests to widen the coverage such as: validation (positives & negatives) and boundaries. See my checklists for other tests.
This approach is particularly useful in agile where full functional requirements might not be available, However, this is just as effective for waterfall development.