Set Your Question’s Scope and Success Criteria
In the last chapter, you turned a vague curiosity into a question that facts can answer. You also met two of the four parts of a good question by name: its scope and its success criteria. Now you’ll actually set them. This is the difference between a question that is answerable in theory and one you can genuinely finish in an afternoon, with an answer you can trust.
Set the Boundaries of Your Question
A question can be perfectly researchable and still be impossible to finish, simply because it tries to cover too much. Setting scope is how you fix that. Remember from the last chapter that scope is the boundaries of what your question covers: who, what, where, and when. Here is how to actually draw those boundaries.
Think of scope as four dials you adjust until the question is answerable:
Who or what is the question about? Name its subject: a specific group, product, or place, not “everyone” or “everything”.
What exactly are you measuring or comparing? One clear outcome, not a vague “better”.
Where does it apply? A particular setting or market, when that changes the answer.
When are you talking about? Right now, the last few years, a specific period.
When a question feels unanswerable, it is almost always because one of these dials is left wide open. Tighten it, and the question becomes findable.
How do I know if my scope is too wide or too narrow?
A scope is too broad when the honest answer would be “it depends” no matter how much you read. “Is social media bad for you?” can never be finished: too many people, too many platforms, too many meanings of “bad”. You would research forever and still not have an answer. A scope is too narrow when you have pinned things down so tightly that the answer no longer tells you anything useful, or no one has ever studied that exact slice. “Did left-handed accountants in one specific town sleep better in March?” is answerable in principle, but no evidence exists and the answer would not matter to anyone.
The sweet spot sits in between: narrow enough that evidence could actually settle it, wide enough that the answer is worth having.
Decide What a Good-Enough Answer Needs
Scope tells you what your question covers. Success criteria tell you what a good-enough answer looks like, decided before you start searching. They are the conditions you will accept as “yes, I can trust this answer and I can stop now”.
Why settle this in advance? Because if you do not, two things tend to happen. Either you stop at the very first result that agrees with what you were hoping to find, or you keep searching forever because no single source ever feels like “enough”. Success criteria protect you from both. They are your finish line, drawn before the race so you cannot quietly move it.
You do not need anything elaborate. A simple, honest checklist works. Before you research, decide that a good-enough answer will meet conditions like these:
It is backed by at least two reliable sources that are independent of each other, not one source and its echoes.
The sources actually measured your scope, the same who, what, and outcome you defined, not something loosely related.
At least one source you consult could have disagreed with your hoped-for answer, so you are not only collecting cheerleaders.
The information is recent enough that it is still likely to be true today.
You can trace each key claim back to where it actually came from (you will practice this later in the course).
Watch Scope and Success Criteria in Action
Let’s run a real consumer question through both steps. Imagine you are about to replace your phone case and you keep seeing cases advertised as “biodegradable”. You wonder:
“Are biodegradable phone cases actually worth it?”
That is researchable in spirit, but the scope dials are all wide open. Let’s tighten them one at a time.
Who or what: not “all eco-friendly products”, just phone cases sold as “compostable”.
What exactly: “worth it” is vague, so pick one measurable outcome. Let’s choose whether the case actually breaks down as advertised.
Where: this matters more than it looks. “Compostable” can mean very different things depending on the conditions, so you decide which setting you care about: an ordinary home compost bin, not an industrial facility you do not have access to.
When: based on testing from the last few years, since products and standards change.
Put those decisions together and the fuzzy curiosity becomes a question you could actually finish:
“Do phone cases sold as ‘compostable’ actually break down in a normal home compost bin within about a year, according to independent testing?”
Now set the finish line before searching. A good-enough answer would:
rest on at least two independent test sources, not the seller’s own website.
test home composting specifically, matching the scope you chose, not industrial composting.
be recent, from the last few years.
let you see how they tested, so the result is traceable rather than just asserted.
Notice that you have not answered the question yet. You have done something more powerful: you have decided exactly what would count as a trustworthy answer, so that when you start searching, you already know what you are looking for and when you are allowed to stop.
Your Turn!
Time to scope a question and set its finish line yourself.
The situation. A friend who is studying for an exam tells you they have heard that music helps you focus, and they ask whether they should try it. The curiosity they hand you is wide open:
“Does listening to music help you study?”
As it stands, this is too broad to finish: “music” covers everything from silence-breaking lo-fi to loud lyrics, “help” is undefined, and “you” could be anyone.
Your task. Turn it into something you could actually research.
Set the scope. Pin down at least three boundaries (who, what kind of music, what outcome you would measure, in what situation).
Write the success criteria. List two or three conditions a good-enough answer would have to meet before you would trust it.
Deliver: one scoped question (a single sentence), plus two or three success-criteria bullets, plus a few words noting which boundaries you decided to set. This is exactly the scope-and-criteria block you will fill in on your project’s Question Canvas, so keep it.
Then check your answer against the model solution found at the end of this chapter.
Let’s Recap!
Scope is set by adjusting four dials, who or what, what you measure, where, and when, until the question is both answerable and worth answering.
A scope is too broad when the answer can only be “it depends”, and too narrow when the answer no longer matters or no evidence exists.
Success criteria are the conditions a good-enough answer must meet, decided before you search so you neither stop too early nor search forever.
Useful criteria usually require more than one independent source, a match to your exact scope, and room for a source that could disagree.
Scope and success criteria together turn an answerable question into one you can actually finish and trust.
You now have a question that is sharp, bounded, and tied to a clear finish line. In the next chapter, you’ll build the search strategy to go and meet it, including the searches deliberately designed to prove yourself wrong.
Model Solution
There is no single right answer, but a strong one makes its decisions visible. Here is one good version, with the choices called out.
“For a university student revising alone, does listening to music without lyrics help them remember more of what they studied, compared with working in silence?”
A good-enough answer would:
rest on at least two independent studies that actually measured memory or test performance, not just how people felt.
match the scope: students, instrumental music, studying alone.
include at least one source that found no benefit, so the answer is not cherry-picked.
Why this works:
The scope is tightened on three dials: who (a university student revising alone), what kind of music (without lyrics), and the outcome (how much they remember), compared against a clear baseline (silence).
“Help” became measurable: remembering more of what was studied, instead of a vague feeling of focus.
The success criteria set a real finish line: more than one independent source, matched to the scope, including one that could have disagreed.
Now compare a weak attempt:
If your version set a few real boundaries and wrote criteria that a “no” could still satisfy, you have got the move. The exact topic matters far less than the discipline of deciding what you cover and what would convince you, before you search.
