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Source: a teaching framework prepared by the author; the weights change with the task.

From a Score to a Defensible Decision
A score does not summarize the whole decision. Write beside it: the approved scope of use,
the prohibited cases, the required references, the review owner, the limits of authority, the

fallback plan, and the re-evaluation date. A tool may be suitable for internal summarization
and unsuitable for answering the public, or suitable for research and unsuitable for carrying
out changes.

Re-evaluate when the version, the price, the data policy, the knowledge base, the file types,

or the audience changes. Choosing a tool is not a permanent marriage; it is an operational
hypothesis subject to monitoring.

One choice does not have to be final in every case. When a question is consequential and
the evidence is contested, it is worth putting the same task to two systems built by different

providers and reading the disagreement rather than the agreement. Where they converge,
you have gained little assurance, because both may share the same weakness. Where they

diverge, they have marked the exact place that needs a source, a calculation, or a person.
Treat this as a triangulation habit, not as a vote. Do not average two answers, and do not
accept the more fluent one. Take the point of difference, trace it to a primary source or to

your own data, and record which system said what. The cost is one extra request; the gain
is that the tool tells you where it is least reliable.

● Remember: Section summary
• Key idea: Gates come before weights, and a score is not a decision.

• Practical decision: Write the scope, the prohibited cases, the review owner, the
fallback, and the re-evaluation date.
• Mistake to avoid: Allowing strong scores on some factors to compensate for a failed
mandatory gate.

3.11 Extended Case Study: An Assistant for University Regulations
◇ A composite teaching case

This case is not a report about any particular university. It is a composite scenario that
shows how the selection method applies to a realistic problem.

Background: a university wants to reduce the time staff and students spend searching for

the rules on registration, withdrawal, transfer, and appeals. The regulations are spread
across Arabic PDF files, some of them superseded by later versions, and they contain tables
and appendices. What is required is a short answer that cites the article, the page, and the

link, and that abstains when no clear rule exists.

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