They need help with the number and pace of things they have to deal with

There is a limit to the number of things human beings can focus on at one time, and there is a limit to the number they can direct their attention to in a day. People vary in this respect – some are better at multi-tasking and switching focus rapidly but others find this hard or even upsetting. This indicates a different specialism – some employees might be extremely valuable in posts that involve keeping careful watch on one process for a long time without losing focus, but would not thrive in a more volatile role. Where possible use the characteristics that are wired into people rather than trying to fit square pegs into round holes. Generally, if you organise the day around the natural rhythm of the human being – 90 minutes concentrating and then a break to clear the head – you will get better focus and fewer mistakes.