Hi Preeti,
For the evaluation of T&D, the widely used model is Kirkpatrick's Model. It consists of four steps:
1. Reactions
2. Learning
3. Behavior
4. Results
1. Reactions: "Reaction may best be defined as how well the trainees liked a particular training program." Reactions are typically measured at the end of training—at Point 3. However, that is a summative or end-of-course assessment, and reactions are also measured during the training, even if only informally in terms of the instructor's perceptions.
2. Learning: "What principles, facts, and techniques were understood and absorbed by the conferees?" What the trainees know or can do can be measured during and at the end of training but, in order to say that this knowledge or skill resulted from the training, the trainees' entering knowledge or skills levels must also be known or measured. Evaluating learning, then, requires measurements at Points 1, 2, and 3—before, during, and after training.
3. Behavior: Changes in on-the-job behavior. Clearly, any evaluation of changes in on-the-job behavior must occur in the workplace itself—at Point 4. It should be kept in mind, however, that behavior changes are acquired in training and they then transfer (or don't transfer) to the workplace. It is deemed useful, therefore, to assess behavior changes at the end of training and in the workplace.
4. Results: "Reduction of costs; reduction of turnover and absenteeism; reduction of grievances; increase in quality and quantity of production; or improved morale which, it is hoped, will lead to some of the previously stated results." These factors are also measurable in the workplace—at Point 4.
Hope you got it.
Dips