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This article provides insight into how the Stockholm Environmental Institute (SEI) used the life-cycle costs approach while collecting household sanitation and hygiene data to support their study on productive and conventional on-site sanitation in Rwanda. Vera van der Grift (IRC) interviewed Nelson Ekane (SEI) to learn about their use of life-cycle costing and their future plans for the approach.

The Life-cycle costs approach was used in the collection of household sanitation and hygiene data for the Stockholm Environmental Institute (SEI) project: Rules, Roles and Resources (RRR) - A comparative study of productive and conventional on-site sanitation.

This research examines productive sanitation pilot implementation in the Burera district in Rwanda, and compares this with conventional on-site sanitation (pit toilet) from three inter-related perspectives:
1. Institutions – rules – what (combinations of) formal and informal rules apply?
2. Organisation – roles – what labour is involved? How is the work managed?
3. Economics – resources – what payments are made? (in kind/cash, subsidised or on commercial basis).

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