WEBVTT

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Risk informs where the design review needs
depth.

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In our fictional case, a missing mixing
protection

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can permit transfer after loss of
agitation,

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potentially affecting concentration
uniformity.

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Explain that mechanism before assigning a
priority.

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Another issue, such as an inconsistent
drawing title,

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may primarily affect document control.

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Both require action, but their
consequences differ.

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A risk label without an explanation gives
the reviewer

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little basis for deciding what evidence is
enough.

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A numerical risk score can organize
discussion

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but cannot supply missing knowledge.

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This lesson uses no universal score
threshold.

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If a serious failure has weak evidence for
prevention or detection,

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keep that uncertainty visible even

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when an arithmetic total looks small.

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Review assumptions, operating conditions
and dependencies.

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Do not reduce a risk rating merely

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because a proposed control appears on the
drawing;

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its effectiveness still needs support and
later verification.

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For the mixing scenario, the proposed
control inhibits transfer

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when loss of agitation is detected.

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Review sensor coverage, logic,

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bypass authority and reset behaviour.

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Ask whether the sensing arrangement could
miss the failure being considered.

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Link the design response to a planned

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controlled challenge of the protective
function.

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The teaching diagram shows failure,
control

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and verification as connected steps,

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not as proof that any specific interlock
is already effective.

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A useful risk-informed review records what
remains uncertain,

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who will resolve it and what change
triggers another review.

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For example, a later product with
different viscosity

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may invalidate the original mixing
assumption.

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Keep that trigger linked to the
requirements and design.

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Your activity is to compare two design
findings

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and justify the depth of review for each.

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Do not force every question into a
numerical ranking

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when a reasoned explanation is clearer.