OPS.9:4.3 - State a mechanism and a rival

Express the candidate explanation as a relation: “Under this demand and access pattern, the final test cannot process the required eligible load before the horizon,” or “Late prerequisite delivery leaves the booked rig without eligible packages.”

Name an alternative that could produce the same observation and change treatment. Examples are insufficient usable rig time versus incomplete kits; scarce acceptance effort versus evidence repeatedly missing at acceptance; or slow processing versus arrivals concentrated near the deadline.

Give each explanation an expected observation and a possible defeater. If both predict the same data, the present observation cannot choose between them. Do not rename a queue “the constraint” to close that gap.