Once implemented, an approach should be tested for effectiveness. The key question is whether the message had the intended impact on the audience. If the message was not effective, then the health and safety communicator should review the effort and consider revising it with the hope of refining it (see Figure 6.1). This explanation implies that you test the message following its delivery to the audience. In fact, you should test the effort before and during its implementation as well. This is called pilot testing. This chapter covers the important step of reviewing, revising and refining your health and safety communications during development and delivery. First, though, you should be familiarized with evaluation.