Building a conceptual model

Clearly state goals for developing the model

Some examples:

• to synthesise the understanding of ecosystem processes and stressors for a specific theme within a catchment
• to identify gaps in knowledge about ecosystem processes for a specific theme within a catchment
• to develop models to support management decisions for NRM investment.

Identify the scope of what is under investigation

It is important to clearly identify the boundaries (spatial or temporal) or even whether the elements of an ecosystem or its pressures will be the main focus.

Identify key components of the model and pressures

This is where components may first be identified as a pressure, state or response to help construct the model. The team developing the model may consider in more detail how best to present the conceptual model, although this may change as the model is developed.

Identify relationships between components of the model

An understanding of the linkage between these components will either come from collaborators' technical knowledge and experience or from the literature. The best models are those that stay simple. If the detail is too complex, consider breaking the model into smaller components.

Documentation

It is not only important to document sources of evidence that have been used to formulate the model but also any key questions, assumptions or limitations. This will ensure knowledge is not lost over time, when the model is reviewed or used at a later stage as part of the evaluation.

Review and refine the model

When first developed, the model will be based on best-available knowledge. As new knowledge becomes available, the model may need to be reviewed and any management decisions implemented.