Trade-off reasoning
Explain what each option buys, what it costs, and what would change the choice.
Predict first
Before you read: predict
A catalog comparison lists two new search options but no description of what continues if neither is adopted.
What addition makes the comparison complete?
The 30-second version
List real alternatives, including continuing today and using a familiar adequate approach. Compare them against the requirement that actually excludes a choice. Record benefits and burdens, including who carries each burden and when. Then state a known change in circumstances that would make another option fit better. A favourite tool is not a complete comparison. [S1–S4]
Explain what each option buys, what it costs, and what would change the choice.
How it works
Step 1 of 6
Analogy: Choosing a raincoat for a stated trip
For an invented trip, a traveller compares keeping the current coat, buying a familiar standard coat and commissioning a specialist garment. Assume the current coat meets the planned shelter conditions, the standard coat suits longer exposure, and the specialist garment adds a maintenance burden. These are supplied analogy facts, not product or outdoor-safety advice.
Buying creates a cost now; carrying and maintaining the garment create burdens later. The lightest garment need not meet the stated exposure constraint. If the trip's conditions change, the comparison must use the new requirement. The comparison can still prefer the current coat when it meets the need and a purchase adds no relevant benefit.
| Clothing comparison | Design comparison |
|---|---|
| Keep the existing coat | Business-as-usual baseline |
| Familiar standard garment | Adequate established option |
| Required exposure protection | Binding requirement |
| Buyer, wearer and maintainer | People carrying costs |
| Purchase and repeated care | Immediate and ongoing costs |
| Changed trip conditions | Explicit condition changing preference |
The analogy explains a comparison, not a scoring formula. It cannot establish software failure behavior or turn qualitative claims into measured values. Technical evidence must support the actual options; any numerical cost model needs explicit inputs and arithmetic of its own.
Try it
Answer first, then check. Nothing is saved.
Question 1 of 5
A product editor needs an acknowledged update to survive a process crash. Rapid acknowledges from memory; Steady writes before acknowledgement; Cheap also acknowledges from memory. Rapid has the shortest normal path and Cheap the lowest invoice.
Which choice remains supported?
Question 2 of 5
An importer option lowers initial setup work and has a monthly vendor charge. It also changes what the team must maintain after release.
Which entry belongs beside the two existing entries?
Question 3 of 5
Local search is currently preferred because stores may work offline. The team is considering three new facts.
Which fact would require re-evaluating that preference?
Question 4 of 5
A product-search objective is fixed. The feature ledger lists S1: campaigns; S2: search; S3: search, recommendations and campaigns.
Which candidate belongs in the minimum-scope slot?
Question 5 of 5
One catalog component has the required endpoint behavior. A procurement owner can renew its license, while a different team would need to learn its alerts, regression checks and incident behavior.
Which consequence boundary belongs in the decision record?
Go deeper
Pro tip
Authored presentation habit: keep option labels stable across revisions of the comparison. If a label changes, add a short rename note so readers can follow the discussion without mistaking renamed alternatives for newly proposed ones. This is a writing aid, not an assessment rule.
Related lessons
Checked against the tools and docs as of 2026-09-29.