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Efficiency Measures Key

	= capital cost		= cost effectiveness		= implementation complexity

No cost Zero Capital cost		Immediate Payback Measure pays for itself immediately.		Simple Requires no technical knowledge and is easily done.

Low Cost A relatively small investment needed.		Short Payback Measure typically pays for itself in under a year.		Low Complexity Requires basic craft skills to implement.

Medium Cost Some investment needed.		Medium Payback Measure typically pays for itself in less than two years.		Medium Complexity Will require some specialist knowledge and craft skills to implement. Larger organisations may have the skills in-house.

High Cost Substantial capital investment required.		Longer Payback Measure typically takes greater than two years to pay for itself.		High Complexity Significant technical experience needed, even larger organisations will probably require the assistance of outside specialists.

For Example:

	No cost/immediate payback/simple - the measure will not require any capital investment, will give an immediate financial saving and is simple to implement.
	= Medium cost/short payback/low complexity - the measure is likely to require a noticeable capital investment, but will pay for itself quickly and be fairly straightforward to implement.