The problem statement is the problem - it's way too broad and vague to yield useful results. If the aim is to find a solution to a specific problem (e.g. using less water), that should be the problem statement. If the aim is to find a novel improvement over the "standard" skyscraper, it should start with a reference design and then ask for an improvement subject to some reasonable constraints (e.g. improve one of the listed areas for at most a 10% cost increase).