This assignment is asking you to consider the nature of internal and external crime so you will need to define these terms, and explain why you are doing so, in the early stages of the essay. You will need to evaluate the ways and means of preventing loss, of which there are a range of methods and stages, and choose a specific focus to make the task manageable. It may be that you discuss a specific type of crime, for example fraud (which can be perpetrated by employees as well as the general public), but again ensure you provide a clear definition of this and justification to why. Again some consideration of how preventative methods have been arrived at is necessary. It is important that you discuss practical measures but you may want to extend your scope to partnership agencies such as the criminal justice system that may play a role. As always you must support your discussion and critical analysis with reference to academic literature.