Practice Calibration
Use this after attempting independent practice. These are calibration notes for the new cases, not answers to every original open-ended project. The module assessment retains its own scoring and evidence requirements.
Prerequisite calibration
4/s and about 2 in flight under stable compatible averages. Repair units; do not substitute p99 for mean in Little's-law reasoning.
A ready answer includes the example or trace requested in the entry check. A memorized term is not sufficient. Repair the named earlier skill, then change the example and explain it without this page.
Case A
Backlog grows 20/s to 200; at 100/s with no arrivals it drains in 2 seconds. State fluid approximation, capacity and finite-buffer assumptions.
Full practice credit requires the result, assumptions and an explanation of the tempting error. A correctly guessed conclusion without those elements is only partial evidence.
Case B
The unlimited-buffer prediction exceeds capacity; account for admission, rejection/loss or backpressure. Report accepted and rejected populations separately.
The key judgment is which guarantee survives the changed condition. Do not transfer a result from the first case without checking that condition.
Experiment calibration
Use the capacity kit then compare actual burst/load measurements with the model. Preserve units, paces, backlog, admitted/completed counts and sensitivity to service variation.
A usable record links the hypothesis to the actual input, observation and interpretation. The negative control must fail for the intended reason, and the repaired setup must pass the relevant check again. Report unexpected outcomes rather than altering the hypothesis afterward. Explicitly state the model, environment and untested boundary; passing a small fixture never proves every deployment behavior.
Recheck
Explain a fresh variant without the key. Retain the original error, repair, help received and delayed result in the existing evidence packet. Self-calibration is not an independent reviewer sign-off or a learner-pilot result. For retrieval-question explanations, use quiz calibration only after attempting the quiz.