When a new chemist is hired at Praganost, a pharmaceutical manufacturing company, he or she is given rejected samples to work with until his or her supervisor is convinced that he or she can be part of the team involved in the actual production of medicines. This is a cost-efficient training method because the actual expensive and critical ingredients are not used. In the context of training methods, this scenario best illustrates .

Vestibule Training.

Explanation:

Vestibule training is a method for training where staff is trained near the job. This means staff should be trained inside the walls of office or factory. This method includes training the staff near to actual practical working environment.  This technique is easy to use and staff is trained to learn something new while staying in working environment.

In the given scenario the new chemists are given rejected samples to work on and learn the techniques before actually working on the manufacturing of medicines. This is example of Vestibule training. This method is cost effective and enables the chemists to learn new techniques in the working environment.