When your managing large groups of temporary workers within a business, and need a high production rate. You have to find a balance between your workers and what you want to achieve.
If you treat your temporary employees badly and force them to impossible timescales, you will actually be lowering the productivity and goods are more likely to get damaged, either accidentally or deliberately from overworked staff.
Perhaps a better solution is to have a brief intro with employees for a particular area where production needs to be high and on time, and spark a few ice breakers; give them the confidence boost they need to perform the tasks well and don’t be so strict with timing as the happier and confident they are, the better they will perform.
Once you have done this you can stealthily observe those employees, and even gather feedback from supervisors regarding their worth ethic. This is a great way to weed out the bad ones who are lazily or have a poor work ethic, and you can replace them timely for better performing workers; with a more productive team they will work very well together and eventually working in unison with each other to produce great results.
Don’t be afraid to compliment them on a job good done, and tell them that targets were met, or that they were so close and that next time you hope too see them meet those targets; motivate, don’t be forceful.