e training. A standard is also required for comparison. For example if the work accident happened then it might imply that the trainees could not successfully acquired the planned knowledge & skill. Revise on input has to be done such as to review whether the training material has been out-dated or the media of the training should be bilingual instead of purely English.The major advantage of feedback control system is to ensure that the objective of the system is closely monitored & controlled. Once the output varies from the desired result, a regulating procedure & mechanism is to be carried out so that the system returns to its desired state. However, the major drawback of the feedback control system is that it only reacts to what has happened & adjustment is done after the undesirable output has occurred. Sometimes these undesirable outputs may not be acceptable or affordable by the organization. Take the work safety training as example, very often the work accident in laboratory may result in serious injury to the employees or sometimes the result could be fatal. To further improve the control process, a feedforward closed loop control system should be adopted & it is shown below in Fig.3:The major advantage of the feedforward closed loop control system is to be predictive & proactive. Instead of waiting for the undesirable output occurred, corrective action is done to minimize its occurrence. Not only the input will be adjusted but also the output & the process are monitored. Take the work safety training as example again, to achieve feedforward control, a written test is conducted for all trainees immediately after the training, so as to ensure they have acquired the knowledge such as toxic chemical handling & emergency retreating procedures (ERP). The test result is then compared to the standard. If the pre-set standard is not met then adjustment can be done on both the input & the process such as adding real life ex...
