Write A Test Plan
Use evidence and design criteria to write a test plan.
- Criteria and constraints: Design work needs success targets and limits before testing.
- Evidence-based iteration: Changes should trace to data, feedback, or a failed criterion.
Prerequisites are inferred: pending teacher review.
Re-learn the skill with worked practice and clear examples.
Pick the test plan that has all four parts over plans that are missing one.
| Part of a good test plan | What it means |
|---|---|
| Measurable pass/fail rule | A number-based line, like 'alarm sounds in under 10 s' |
| Control | An untreated or standard setup to compare against |
| Controlled variables | Things kept the same so only one thing changes |
| Enough trials | Repeat several times, not just once |
Four students propose ways to test whether a new bandage sticks longer than the old one. Using the checklist, which plan is the strongest?
Reviewed| Part of a good test plan | What it means |
|---|---|
| Measurable pass/fail rule | A number-based line, like 'alarm sounds in under 10 s' |
| Control | An untreated or standard setup to compare against |
| Controlled variables | Things kept the same so only one thing changes |
| Enough trials | Repeat several times, not just once |
- A.Stick the new bandage on a sweaty arm and the old bandage on a dry arm, with 10 trials each
- B.Test both bandages on the same arm, 10 trials each, and count how many last past 8 hours
- C.Stick the new bandage on the same arm for 10 trials and see if it feels good
- D.Ask three friends to wear both bandages and say which one they like better
Show the worked solution ▾
Answer: B. Test both bandages on the same arm, 10 trials each, and count how many last past 8 hours
- Step 1: Look for a control: Comparing the new bandage to the old bandage gives a control to compare against.
- Step 2: Look for controlled variables and trials: Same arm and same conditions keep variables controlled; 10 trials each is enough trials; 'stay on past 8 hours' is a measurable rule.
Why it's right: This plan has all four parts: a measurable rule (past 8 hours), a control (old bandage), controlled variables (same arm/conditions), and enough trials (10 each).
- A: It has trials and a control bandage, but a sweaty arm versus a dry arm changes a variable.
- C: It has trials and a controlled arm, but 'feels good' is not measurable and there is no control bandage.
- D: Asking which one they like is an opinion poll, not a measured test plan.
Aligned to Biotechnology Research and Experiments · reading level ~grade 9
A plan reads: "Run the new bandage on 10 arms and the current bandage on 10 arms, in the same room, and count how many last past 8 hours." Which part of that plan is the control?
Reviewed- A.The same room, which holds the surrounding conditions steady
- B.The current bandage, the standard the new one is judged against
- C.The 10 arms per bandage, which supply enough repeated trials each
- D.The 8 hour mark, which sets the measurable pass or fail line
Show the worked solution ▾
Answer: B. The current bandage, the standard the new one is judged against
- Step 1: Recall what a control is: It is the standard or untreated setup the new thing is compared against.
- Step 2: Find that in the plan: The current bandage is the existing standard, run alongside the new one.
Why it's right: The current bandage is the known standard run alongside the new one, which is exactly what a control does.
- A: Keeping the room the same is a controlled variable, not the control the new bandage is compared against.
- C: Ten arms per bandage is the trials part of the plan.
- D: The 8 hour mark is the measurable pass or fail rule.
Aligned to Biotechnology Research and Experiments · reading level ~grade 9
- A student rejects a one-trial, no-control test before running the real comparison.
Fill these in as you work through the lesson.
- Pass/fail rule (number-based line to judge the test):
- Control (standard setup to compare against):
- Controlled variable (kept the same on purpose):
- Trial (one repeat of the test):
A good test plan needs a measurable rule, a to compare against, controlled , and enough .
- What is the measurable pass/fail rule?
- What is the control?
- Which part is missing?
Read a draft plan and tick the four parts; if one is never mentioned, name it as the missing part.