are products of technological processes. They are used by individual persons, corporations, or nations, and are evaluated based on their task-specific utility. If tools do not work, we exchange them, improve them, adapt them, or discard them (source: Fox et al., 2004. Tools and techniques are particular ways of operating a method. Whether something is defined a s a method or a tool is often debatable; the boundaries are not sharp. A ranking exercise, for example, can involve drawing a matrix in the sand and using pebbles or stones as counters, or be conducted on a sheet of paper using stickers or markers. Similarly a farm visit in which farmers' problems are discussed can be conducted in various modes (persuasive, participatory, counselling, etc.) (source: Leeuwis, 2004).