Sustainability management

 Based on Sustainability topics  (Industrial Ecology, Environmental Management Systems and The Natural Step of sustainability) - in your opinion does any one of these initiatives stand out as a good tool (or tools) for sustainability management?

Do they complement each other?

Or are they better as stand-alone sustainability guidance protocols?

Are certain industries or organizations better suited for these initiatives?

Note - You are requested to discuss and provide your opinion on these items and not just provide short or yes or no answers.