A sanitation system can be visualised as a matrix of functional groups (columns) and products (rows) that are linked together where potential combinations exist. Such a graphical presentation gives an overview of the technology components of a system and of all the products that it manages. The sanitation technologies and their corresponding functional groups can be allocated to three main categories: “On-site”, “Transport” or “Off-site”. Products are successively collected, stored, transported and transformed along different compatible technologies from the five functional groups. The output of a technology in one functional group, thereby, becomes the input for the next. It is not always necessary for a product to pass through a technology from each of the five functional groups; however, the ordering of the functional groups should usually be maintained regardless of how many of them are included within the sanitation system.
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