The manual is intended to provide materials for a course, but the length, of this will depend on how it is arranged. It is suggested that different modules be given at different times, or in different combinations. Experience shows that the first two modules can be given together in one course, which will take about 8 working days, including one for fieldwork and a half day “free”. In a short course participants need to have a break from absorbing large amounts of new ideas and concepts. Such a break ensures that concentration in the second half of the course remains high.