Quotes from James D. Kirkpatrick

Information useful to training professionals typically relates to Levels 1 and 2. You want to ensure that the training resulted in learning, and ultimately, that participants are ready to perform on the job. Information related to credibility typically relates to Levels 3 and 4. You

Evaluation is not an afterthought to training, but rather is meant to be integrated into the entire learning and development process. If you wait until after a program is designed, developed, and delivered to consider what value it is supposed to provide to the organization and how you will evaluate it, there is little chance of the program having much value.