Building-specific monitoring is the gold standard, and a dense regional network is what makes the whole region legible fast. You do not choose between them. You phase them in.
The buildings you cannot lose. The definitive answer on a critical structure comes from instrumenting that structure. Measure what a hospital, an EOC, a control building or a key bridge actually experienced, and get a clear safe-to-occupy-and-operate call in minutes. Start with the assets the region cannot afford to have sitting idle or unsafe.
The regional picture. Around those anchor sites, a network of free-field and structural instruments builds a high-resolution view of shaking across the region. The more points, the sharper the map, and the better you can direct resources and give owners, engineers and the public timely, evidence-based guidance.
Phased, not all at once. Instrument the critical buildings and the EOC first, then densify the regional network over time as budget allows. Every instrument added sharpens the picture, and nothing you install early is wasted later.
Right-sized instruments. Dense coverage on affordable EQR-90s, research-grade EQR-120s where the science demands it, brought together where it helps on the EQR-C. One family, one accountable team.