A Decision Domain is the unit at which Zero-Gravity thinks about movement. It is smaller than a function and larger than a task: pricing, credit approval, incident response, campaign activation, stock reallocation. Each domain has recognisable inputs, an owner, a cadence, and outcomes that can be observed.
Decision Domains matter because organisations do not decide — domains do. Latency, readiness and return are all measured per domain, because averaging them across the enterprise erases the signal. A three-second fraud decision and a three-week strategic pricing decision belong to different domains with different target latencies.
Naming a domain is itself an intervention. It forces the organisation to answer: who owns this decision, what information does it need, and how do we know the outcome was good? Many organisations discover, at this step, that the domain has no owner.