## 4. Lab

When you have realized a prototype, the main question is: does the robot actually decrease grandma's sense of loneliness? You want certainty in the Application context: time for the Lab strategy. The aim here is to evaluate whether your solution indeed solves the problem and fulfills the wishes and demands formulated at the beginning of the project. For different types of requirements, there are different types of tests. You could ask grandma to log each hour how she feels, on a normal day and then the same for a day with the robot, to compare this data. If other grandmas are willing to participate again, you will have even more certainty!