The flows in and out of a resource (the rates at which it grows or declines) depend on existing resources – more sales people should lead to customers being won more quickly, for example.There are two special cases of this dependency that are both very common and important…

What are they?

They are:

• The current level of a resource can affect its own rate of growth or decline
• There is often some potential pool of resource from which the active resource is captured

Resources driving ...