This Standard aims to equip users with a robust framework for designing and verifying NbS that yield the outcomes desired, in solving one or several societal challenge(s). Based on the feedback of actual and potential NbS users, it has been developed as a facilitative Standard, purposefully avoiding a rigid normative framing with fixed, definitive thresholds of what NbS ought to achieve. Rather the Standard is designed to support users to apply, learn and continuously strengthen and improve the effectiveness, sustainability and adaptability of their NbS interventions.