An indicator is not a measure - it is a signpost that will help you understand whether your strategies have resulted in the change you were seeking. It forms part of a suite of indicators that will enable you to paint a defensible picture of effectiveness. Indicators are not designed to measure the effectiveness or efficiency of an individual strategy - instead, they help you to understand whether the strategies implemented have resulted in improved compliance behaviour and community confidence.
When developing your suite of indicators, it's not essential to develop different indicators for each success goal. You may, in fact, find that one indicator can be used against several success goals. This can be helpful in reducing the overall cost of tracking your progress.