Manual testing is critical in all situations, even when tests are also automated. There is nothing that can really replace an observant, intelligent tester who has the skills to identify errors on the “edges”, to think a little outside the box, prioritize their work according to the current situation, analyze their observations and provide immediate and clear feedback. We can test in a detailed, formalized way or in a less formal, exploratory way. However, we will always be structured in our approach to ensure that testing is highly effective.