Transcalar approaches also need to be considered when identifying the “right” scale for stakeholder engagement as they can challenge the usual conception of levels of governance and governments and shed light on stakeholders that are active alternatively at different scales. As a result, it can contribute to making stakeholder engagement more inclusive and implemented at the relevant scale so it effectively contributes to formulating sustainable water policies and projects. But mappings are specific to given places and times, across which targets change and adapt. Such exercises should therefore be iterative, transparent, regularly assessed and adjusted each time targets change to allow actors to leave, and new ones to join, including from outside the water sector. Therefore, formulating rules on how to ascertain that engagement processes remain “fit-for-target” is important to guide decision making and implementation (Figure 3.16). Similarly, the Swiss private bank Pictet Asset Management has financed activities in water reuse and recycling, smart water grids, storm water management and decentralised integrated systems such as rainwater harvesting.