EAM.6:4.1 - Establish the contribution being tested
Recover demand, required service, configuration and horizon. Keep quantities and time units compatible. EAM.4 can supply scenario demand and its place, period and driver conditions; EAM.5 can supply the applicable condition concern. Use OPS.10 or a specialist result to distinguish nominal capability from usable contribution.
State where the service must be delivered and which population or function it protects. An aggregate spare capacity elsewhere is useful only if the arrangement can deliver it where and when needed. Begin with a supply or load bound that the available inputs support.