Three clues, one culprit
The log says the server restarted at 2 am. The night guard saw a power flicker at 2 am. A user's phone shows the Wi-Fi dropped at 2 am.
Any one clue could be a fluke. Three that agree tell a story.
Key words
| Word | What it means |
|---|---|
| Corroboration | making existing information stronger with other sources |
| Cross-referencing | checking one fact in other places |
| Triangulation | checking a result against more than two different sources |
| Observation | watching and recording a task as it happens |
| Conclusion | a short statement of how accurate or fit the results are |
| Recommendation | a suggestion for what to do next |
| Consistent | the results match each other |
The cells students fill in are left blank in this preview.
By the end of this lesson
Note
I can tell corroboration from triangulation and finish an evaluation with a conclusion and recommendations.
Starter
Have a go
Starter
3 questionsYour answers are marked here and are not kept. A college account keeps every student’s marks.
Five ideas side by side
| Idea | What it means | Example |
|---|---|---|
| Cross-referencing | Check a fact in other places | Look up the cable limit in a second guide |
| Corroboration | Strengthen what you already have with other sources | The maker's guide and a textbook both say 100 metres |
| Triangulation | Check results from more than two different sources for consistency | Log, user report and a site visit all show the same time |
| Observation | Watch a task as it happens | Sit beside a user as they raise a ticket |
| Conclusion and recommendation | Summarise accuracy, then suggest what to do | The log is reliable. Fit a power backup |
The cells students fill in are left blank in this preview.
Finish with a conclusion and a recommendation
A conclusion says how accurate the results are, for example: all three sources agree, so power is the likely cause. A recommendation says what to do, for example: fit a battery backup.
Triangulation uses different kinds of source. Three copies of one source are not triangulation.
Check
Have a go
Check
4 questionsYour answers are marked here and are not kept. A college account keeps every student’s marks.