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3. Instruction language that works
| Job | Useful language |
|---|---|
| start | First, make sure that... |
| continue | Next, click / place / measure / connect... |
| warn | Do not... / You must not... |
| give a choice | You can use... or... |
| check | Finally, check that... |
Try, then check: “gloves / put on / first” → First, put on your gloves.
“machine / start / do not / guard open” → Do not start the machine when the guard is open.
4. Can, must or must not?
| Situation | Best instruction |
|---|---|
| Two safe file formats are possible. | You can save it as a PDF or a DOCX file. |
| Eye protection is required. | You must wear safety goggles. |
| The machine guard is open. | You must not start the machine. |
| The student needs help. | You can ask me to demonstrate again. |
One-line test: choose the meaning: can = option/ability; must = necessary; must not = prohibited.
5. The instruction clinic
Each instruction sounds normal, but one detail makes it weak. Find it, then compare with the repair.
| Weak instruction | Repair |
|---|---|
| Save it somewhere safe. | Save the file in the group folder and name it with your surname. |
| Measure the part correctly. | Close the caliper gently and read the scale at eye level. |
| Make a good slide. | Use one heading, one image and no more than three key points. |
| Be careful with the machine. | Keep your hands behind the guard and press stop before adjusting the part. |