The successful, minimalist action required took each manager no more than 20 minutes in total to implement, and the results were perfect every time, with complete flexibility to change holiday arrangements around whenever people wanted to alter their leave dates. And there was always 50% coverage. Now the biggest constraint, obviously, was ensuring that 50% coverage and making that compatible with a degree of free choice as to when to take their vacation days. The situation, in fact, was as simple as can be.
The situation was this: how do we ensure that every technician on holiday is matched by someone who is back at the plant? The action required was equally simple—asking them all to choose a partner and pair up. They were told, "book your leave days for whenever you like, so long as your partner covers you; and change it around later and as often as you like, subject only to the same proviso." And, by the way, they were advised to pick as a partner someone they disliked, so that they could avoid running into each other in France, and so that they could be sure of at least 10 weeks a year without the other chap in their hair!