Draggan notes that

The central argument for monitoring can be stated in a single sentence: You cannot recognize, understand, improve or maintain what you do not or cannot measure. The ability to measure is a necessity—an activity that we need to maintain our well-being and the quality of our lives. Also, this need places monitoring squarely in the context of achieving sustainability; it provides valuable tools that offer indicative measures of:

• Ecological and Environmental Resources;

• Economic Development and Growth; and

• Social Structure and Dynamics.