This is another ‘skill’ (like ‘hitting the ground running’) that people think they have, but they really do not. The more you ask people to multi-task, the worse their work will be and the longer it will take. This applies to multi-tasking at the minute-to-minute level (juggling emails, phone calls, actual work, etc.) as well as the hour-to-hour or day-to-day level (handling multiple projects). The more you demand from people, the more the wheels fall off. To make it even worse, multi-tasking not only is likely to mangle the work, but it grinds people up and sends them looking for another job eventually… forcing you to bring in new people in the middle of a project and causing even more issues.