Identifying and mapping the bigger system around your product or service can equally help you understand the bigger problem you are engaging in. Working with sustainability is a complex task. When you turned on one bottom it might have a negative impact on another. System thinking tools can help you seeing the bigger picture and explore opportunities that were previously hidden to you.
You will find the tools in the literature and in the tutorials on system thinking.
System thinking literature.
Senge, P. 2006. The Fifth Discipline: The Art & Practice of The Learning Organization. Deckle Edge.
Senge, P. 2010. The Necessary Revolution: How Individuals and Organizations Are Working Together to Create a Sustainable World.
Coleman, D. & Senge, P. 2014. The triple focus - a new approach to education. More than sound.
Senge, P. 1999. The Dance of Change: The Challenges of Sustaining Momentum in Learning Organizations. Fieldbook.