This is a great clarifying point. In international development, like in software development, the waterfall approach will always have a place. We can't imagine an infrastructure project, for example, taking an agile approach. However, we think an agile approach is particularly useful in a couple settings. First, when we know what is needed (essential medicine, clean water, etc.) but don't have a great track record of ensuring these goods reach their intended beneficiaries. Second, when we simply don't know the solution, and we need to co-design it with the intended beneficiaries. Our hope is that we can open a conversation about how the Bank and other institutions can incentivize the use of agile when and where it is appropriate.