This booklet sets out why engineers should involve both men and women in infrastructure projects and why women's participation has a special emphasis. It introduces ways in which engineers and technicians can ensure their projects focus on the needs of men and women. As well as providing an introduction for engineers and technicians who have not covered some of the social issues before, this booklet is also useful for managers who do understand the issues but are seeking ways to tackle these, or for those who wish to explain the problems and solutions to their colleagues.