The purpose of the evaluation, i.e. what you want to know, will determine the appropriate time to carry out the evaluation but as a very general guide:

• -Validation - immediately following the event.
• -Objectives - throughout delivery of the training or at the end of the event.
• -Learning - if checking learning has taken place, this can be done immediately following the learning, dependant on whether there has been an opportunity to use the learning in the court environment.
• -Impact - dependant on what the training was and what would be an appropriate period of time for the desired changes to take place.