At the same time, the guidance describes an overall water management process covering 5 stages: i) assessing the global and local water situations, ii) accounting for and understanding impacts, iii) identifying water risks and opportunities, iv) determining actions and setting targets, and v) monitoring and communicating performance. Step 1 sets the boundary using questions such as: how much water is available? Or what is the local demand for water? With regard to actual accounting, seven tools are mentioned useful for Step 2, with references to existing measurement methods such as BIER practical perspective on Water Accounting, GEMI Local Water Tool, and ISO Water Footprint: Requirements and Guidelines.