Staff performing more complex tasks will need longer, more structured training. The most important thing to consider when conducting training is to maximise the amount of information learned and retained by trainees. Of course, likes most rules of thumb, the effectiveness of any particular training technique will differ from person to person. What works for one person might not work for another, so a range of techniques will usually be employed to ensure every person's needs are met. The training needs of casual staff such as polling officials are very different from the needs of permanent staff.
Casual staff using technology usually perform a range of limited, specific tasks.
Consequently technology training can be tailored to those limited tasks, which can mean that training can be delivered in a short, easily-digested form. This is fortunate, as casual staff are often employed in large numbers, and it may not be practical or cost-effective to deliver intensive, lengthy training to these staff. The complexity of the training needed for casual staff such as polling officials will depend on the complexity of the technology. This is a good reason for keeping technology simple to use and supervise. The simpler the technology, the easier it will be for casual staff to operate with minimal training.