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So which tool to apply - Is the system simple, complicated or complex?

There are so many tools and approaches that it can sometimes be difficult to see the bigger picture that guides the selection of different approaches, and how they interlink in practice. In particular there is a need to appreciate the concepts of complicated and complex in order to fully understand the context and landscape which leads to the choice of appropriate interventions that will address the issues of sustainability.

According to Glouberman and Zimmerman systems can be understood as being simple, complicated, complex. Simple problems, such as following a recipe or protocol, may encompass some basic issues of technique and terminology, but once these are mastered, following the "recipe" carries with it a very high assurance of success. Complicated problems, like sending a rocket to the moon, are different. Their complicated nature is often related not only to the scale of a problem (cf. simple systems), but also to issues of coordination or specialised expertise. However, rockets are similar to each other and because of this following one success there can be a relatively high degree of certainty of outcome repetition. In contrast complex systems are based on relationships, and their properties of self-organisation, interconnectedness and evolution. Research into complex systems demonstrates that they cannot be understood solely by simple or complicated approaches to evidence, policy, planning and management. They require an understanding of unique local conditions and their historical pathways. As a result there is always some uncertainty of outcome.

These reviewers and others on this page remind us that social systems are complex, and aim to help us think about how to carry out useful interventions within complex systems. In this context we can better appreciate that while adaptive, self-organising social networks produce observable patterns in response to interventions that are neither predictable nor generalisable, it remains crucial that we learn to better understand our interventions to inform future possibilities.

Working with complex systems

Managing transitions

More specific tools, guides and processes that can be used within the wider context outlined here can be found from other pages in this section. A good place to start is to look at the range of guides and manuals that have been developed in a range of sectors.