It is crucial that you identify the key issues arsing from the in-tray exercise. You should aim to complete every task within the in-tray exercise in the limited time given. However, as you are being assessed, it is also important to remember that it is not about getting everything done in the in-tray exercise quickly. Judging on what aspects of the in-tray exercise that are more urgent or important than others, and finding that balance between working effectively and efficiently is what can lead you to a successful outcome in your in-tray exercise.