Revision history [back]
I would agree with Martin Ager's comment about the answer being context specific. I would suggest the starting point is what was the norm before the disaster, what is the situation now and what can be realistically achieved within the timescale and scope of the project to come up with a target. Adopting an unrealistically ambitious target may for instance mean only a few people will benefit. Referring to standards is important, but judgement is even more so.