Comment on why the behavioural change program will not be a success in the below paragraph:

After the presentation series is finished, you decide to develop the programme with some of the workers from the shopfloor. Fifteen morning$-$shift workers from this department are randomly chosen to be observers. These are a mix of new and long$-$term printing press workers, indoor vehicle operators, and a supervisor. You arrange a one$-$day training session for the observers that explains how to observe, give observation feedback, and measure worker behaviours and safety performance. They then practise these skills. Due to production demands, only twelve of the fifteen observers complete the scheduled training.