Dynamics describe how one node influences another: in other words, any causal relationship within your system is a dynamic. Note that one node can influence another in two ways – positive and negative – and the effect can be immediate, or delayed:
More of A leads to more of B
Prevalence of mobile phones leads to more access to pricing information for smallholder farmers.
Spending on advertising leads to more sales.
More of A leads to less of B
Rainy days in summer lead to lower sales of ice cream.
Spending on software leads to less time spent on billing customers.
A changes B, but after some time
Malnutrition during childhood leads to mental stunting in adults.
A decline in sales this month will be reflected in inventories next month.
- All dynamics are either positive or negative – and the delay just adds a timescale modifier.
- Positive doesn’t mean ‘good’ and negative doesn’t mean ‘bad’ – it just indicates the direction of the influence.