What You Need to Know
An adjustment round means changing a request, running it again and judging the output. Objective 1.3 taught what good feedback sounds like inside a conversation. This one covers the discipline around it. A systematic round gives you more than a different result: knowledge you can reuse tomorrow and explain to a colleague. That takes three parts: change one thing at a time, hold the test input fixed, and judge the result against a criterion stated before you look.
A carpet shop has Claude draft the quote letter it sends after each measuring visit. Customers keep ringing to ask for the total.
Change One Thing at a Time
One change at a time shows what fixed the output. Say the owner changes only the audience line and the letter improves. The audience line was the problem, and that lesson transfers to every similar task. Say she changes the wording, the model and the attached example at once. The letter improves, and nobody knows which of the three worked. Tomorrow's version of the task starts from ignorance. A bundled change looks efficient until you need a second good result. Anthropic's Help Center says an effective prompt contains as much context as possible. On adjustment, it goes no further than giving Claude feedback, clarifications and rewrite requests. The one-variable discipline is ordinary professional method.
Hold the Test Input Fixed
A new prompt tried on a new document tells you nothing, because two things moved. A better result may only mean an easier input. Holding the test input fixed (the same course, report or source file) makes round-to-round comparison meaningful. For the owner, that is one customer's measuring notes, used every round. Editing an earlier message creates a different version of the chat with its own artifacts. Each round can start from the same input and be read against the round before.
State the Criterion Before You Look
"Better" is not a criterion. "A customer can find the total price in five seconds" is. Stating it in advance stops your judgement drifting towards whatever the new draft happens to do well. That drift is how a round that fixed nothing gets accepted. A stated criterion also makes other people's reactions usable. A returned draft plus a criterion identifies which requirement failed. "The manager didn't like it" identifies nothing.
Feedback Arrives from Readers, Not Just the Text
The results that matter often come from outside the conversation. A colleague says the tone is off. A manager returns a draft. A reader asks the same clarifying question three times. These usually locate the gap more precisely than re-reading the text yourself. The customers ringing about the total are such a result. Treated as inputs to the next round, not noise, they let you iterate on whether the output works. Ignored, they leave you iterating on how it looks.
Know When to Stop Adjusting
Adjustment assumes the approach is right and the execution is off. When several well-aimed rounds have not moved the output, that assumption has failed. The task may need different source material, a feature such as web search or Research, or a different setting. It may be work that shouldn't be handed over at all. The third failed adjustment is a signal to go back to 7.1's cause list and re-diagnose. A fourth round of slightly different words tests the same failed assumption. If the owner's third round still leaves customers ringing, she stops rewording.
In the exam
Each of the three parts earns exam items. The exam dresses the bundled change up as decisiveness.
Where this method comes from
No Anthropic article teaches one-variable adjustment. The Help Center's advice stops at giving Claude feedback and asking for rewrites. Branching a chat only gives you versions to compare. This lesson's discipline rests on the exam guide's objective wording and ordinary professional practice.
Exam Traps
The shotgun fix dressed as decisiveness
Changing the wording, the model and the example in one round produces a draft nobody can learn from: the improvement cannot be attributed, repeated deliberately, or explained. The keyed answer moves one variable and keeps everything else still.
A fourth round of rewording after three aimed rounds moved nothing
Repeated failed adjustment is evidence about the approach, not an invitation to adjust harder. The fix has moved out of the wording, and the professional response is to re-diagnose against the cause list: different material, a different feature or setting, or a task that should not be delegated.
Testing the adjusted prompt on a different document and crediting the prompt
When the input changed too, the comparison is meaningless; the improvement may only mean the new document was easier. Round-to-round learning requires the same test input every time.
Practice Scenario
The owner of a ceramics studio drafts the joining email she sends attendees before each weekend workshop, and attendees keep saying it is too long and too formal. She has time for one adjustment round this week. Which round is set up to teach her something?
Build Exercise
Run One Honest Adjustment Round
What you'll learn
- How to fix one instance of a task as a test case
- How to write a pass-or-fail criterion before adjusting
- How to change exactly one variable per round
- How to recognise the third failed round as a signal to re-diagnose
- Take a real recurring task whose last output disappointed you, and fix one instance of it as your test case
Why: A fixed test input is what makes round-to-round comparison meaningful; without it, a better result may only mean an easier input.
You should see: One named test case: the same document, request and materials you will use for every round.
- Write down the criterion before you start: one sentence describing what the improved output must let its reader do
Why: A criterion stated in advance stops your judgement drifting to whatever the new draft happens to do well.
You should see: A single written sentence with a pass-or-fail reading, not a wish for something better.
- Change exactly one thing about your request: the audience line, the attached material, or the order of requirements, and note which you chose
Why: One moved variable is what lets an improvement be attributed, repeated and explained; a bundle of changes teaches nothing.
You should see: A one-line record of the single change this round makes.
- Re-run the request on the same test case and judge the result only against the written criterion
Why: The criterion is the judgement; general impressions let a round that fixed nothing get accepted.
You should see: A pass or fail verdict against the criterion, recorded next to the change that produced it.
- If the round fails, run at most two more aimed rounds; if the third fails too, stop adjusting and re-diagnose against 7.1’s cause list
Why: Repeated failed adjustment is evidence that the approach is wrong, and the professional skill is noticing the signal rather than rewording harder.
You should see: Either a passing round, or a written note that adjustment has stopped and diagnosis has reopened.
Sources
- My prompt isn't giving me a helpful answer — Anthropic
- What are artifacts and how do I use them? — Anthropic
- Claude Certified Associate – Foundations Exam Guide — Anthropic. No Anthropic article teaches the one-variable, fixed-input, stated-criterion method. This lesson draws on the exam guide's objective and standard practice; the Help Center documents the feedback direction.