Instructions are part of the product
A well-made object with poor instructions can still fail the person using it. They may assemble it wrongly, use it in a way that damages it, or miss a safety point. Instructions are not paperwork added at the end; they are part of the design, and writing them often reveals problems in the object itself. If an assembly step takes a paragraph to explain, the design may be too complicated.
This article is general information. Requirements for labels, warnings and manuals differ by place and product type, and some categories have specific rules, so check what applies to you and consider professional advice if you sell.
Know your reader
Instructions are for someone who has never seen the product and may be tired, rushed or unfamiliar with technical words. Think about their likely experience, the tools they have, the space where they will work and whether they might be reading in a second language. Notes from conversations with users help here. A good rule is to write for the least experienced person who might reasonably use the product.
A typical structure
Most useful instruction sets follow a similar order:
- Title and purpose. What the product is and what it is for.
- Safety summary. The few most important warnings, placed before the steps they apply to.
- What is in the box. A parts list, ideally with a small picture for each item.
- Tools needed. Listed separately so the reader can gather them first.
- Setup or assembly steps. Numbered, in order.
- Normal use. Basic operation, with the most common tasks first.
- Care and cleaning. What to do and what to avoid.
- Troubleshooting. A short table of common problems and fixes.
- Contact and repair information. Where to ask questions, and how to get help.
You may not need every section, and a small project might fit on a single page. The order matters more than the length.
Writing the steps
- One action per step. “Insert the pin and tighten the screw” is two steps.
- Start with a verb. “Press the button until the light turns on.”
- Use numbers. People often look away and return, so numbered steps let them find their place.
- Be specific. “Tighten until snug” may be more helpful than “tighten firmly,” and a stated size or direction is better than “the small one.”
- Keep terms consistent. If it is a “cover” once, do not call it a “lid” later.
- Say what the result should look like. “You should hear a click” lets the reader confirm success.
- Avoid jargon, or define it. Readers may not know what a standoff or a jumper is.
If part of your product involves electronics, a simple labeled circuit diagram can show connections better than paragraphs, but only when readers can interpret it.
Use pictures well
Images often communicate faster than words, especially for assembly. Good illustrations show the actual orientation of parts, highlight the relevant area, and match the text. Keep pictures near the step they illustrate. Arrows can show direction. A rough drawing is better than none, and a photo with annotations is often enough for a small-scale maker. Do not rely only on images if the reader might not see them well, and provide text for key points.
Warnings that work
Warnings are the last line of defense after design has removed or guarded against hazards, as product safety thinking suggests. They cannot fix a dangerous design, but they matter for remaining risks.
A good warning typically has:
- A signal that it is important, such as the word “Warning” or “Caution.”
- The hazard: what could go wrong.
- The consequence: what harm might result.
- How to avoid it: what to do or not do.
For example: “Warning: Hot surface. Can cause burns. Allow to cool for ten minutes before handling.” Put the warning where the reader will see it before the risky action, not on a separate page at the end. Use warnings sparingly. If every line is a warning, readers stop noticing any of them.
Do not use instructions to claim more safety than you can support. Avoid promising that a product is “safe,” “non-toxic” or “certified” unless you have good grounds and know what those words mean where you live. Homemade safety equipment or devices should not be presented as replacements for certified ones.
Layout and readability
Use short paragraphs, plenty of white space and headings that describe the content. Choose a legible type size and good contrast between text and background. Avoid dense blocks. For physical products, think about where the information will live: a card in the box, a label on the product, a webpage with a printed link or QR code. Printed material can be lost, so put the most critical safety information on the product itself where practical.
Test the instructions
This is the step most people skip. Give the instructions and the parts to someone who has not seen the product, say nothing, and watch. Note where they hesitate, skip steps or make mistakes. This is the same idea as usability testing for the product, applied to the paper. Every confusion is a clue to revise. Then fix the text, or the design, and test again with another person.
Keep them up to date
If you change the product, change the instructions. Date or version them so users can tell which they have. When you receive questions or complaints, treat repeated ones as a sign that something needs rewriting.
Clear instructions will not guarantee that everyone uses a product correctly, but they reduce avoidable mistakes and show care for the person on the other end.