OPS.10:4.2 - Recover usable time and required load

For each necessary resource, identify capability, access, calendar, location, configuration and skill conditions. Deduct known unusable intervals only where they actually remove the needed service. Keep uncertainty about outages or absence separate from known deductions.

Translate each demand class into resource-time requirements under the supplied Method. Include normal setup, joint-resource occupancy, expected or scenario-specific rework, recovery and other consequential load. State which effects are already included in a service-time estimate so they are not counted again as lost capacity.

Use compatible units. Two hours of a specialist and two hours of a general resource are not four hours of interchangeable service. A test attempt and an accepted release are not two interchangeable outputs.

The first calculation is a necessary bound: required load cannot exceed usable time for a resource within the required window. Passing that bound is not enough when precedence, arrival timing, simultaneous resources or non-interchangeable classes can prevent a schedule.