Harvesting Tacit Knowledge It is generally agreed that we have neglected the knowledge derived from experience, focusing instead on the knowledge derived from the analysis of routinely collected data, stats or information, and knowledge derived from research, namely evidence. This is a resource of vital importance and a resource that will grow. It is expected that each Public Health professional will submit a case report each year and this will be kept as a closed resource to encourage people to describe their failures as well as their successes. It is hoped that professionals will report on the projects that did not go so well as well as on those that were highly successful, for there is a proverb in management that we learn more from out mistakes than our successes. There is another proverb that says that although it is important not to re-invent the wheel, it is sometimes necessary, but what is really important is that we do not re-invent the flat tyre.