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The Role of Product Instructions in Product Liability Prevention

Why It’s Hard to Create Good Instructions, and What to Do About It

One of the most difficult tasks I perform in my product safety and prevention practice is to counsel companies on instruction manuals and other forms of safety communications. Unlike warnings attached to the product, which should be short and to the point, separate instruction manuals and other forms of communication such as safety videos can be unlimited in space and scope.

With instructions, space limitations are no excuse. Therefore, if a manufacturer forgets to include some pertinent instruction or says something unclearly, the plaintiff could easily argue that they misunderstood the instructions or were misled by them, and suffered an injury as a result.

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This article will examine the law, the standards and best practices concerning instructions and provide some suggestions on how to do a better job in the future.

The Law

The Restatement 3d of Products Liability says that a manufacturer has a legal duty to provide both warnings and instructions. However, it distinguishes between instructions which are meant to “inform persons how to use and consume products safely” from warnings which “alert users and consumers to the existence and nature of product risks so that they can prevent harm either by appropriate conduct during use or consumption or by choosing not to use or consume.”

When the Restatement discusses the adequacy of warnings and instructions, it uses the same criteria. It makes it clear that adequacy is to be judged by using a reasonableness test, which it admits provides no easy guidelines. It encourages courts to focus on factors such as content and comprehensibility, intensity of expression, and the characteristics of expected user groups.

The common law is clear that instructions which do not warn of foreseeable hazards, but merely instruct as to how to use the product, are inadequate in meeting the duty to warn. In addition, courts have said that instructions must be “full, fair, and adequate,” “adequate, accurate and effective” and “clear, complete and adequately communicated.” This language is not really helpful in providing guidance as to what is reasonable.

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The lack of guidance in the law and the difficulty in anticipating how a jury will react to a particular set of instructions makes the manufacturer’s job somewhat daunting. However, there are some things out there that can be helpful.

Best Practices

There are many directives, guidelines, standards and checklists for creating instructions. The U.S. Consumer Product Safety Commission (CPSC) published a booklet in October 2003 entitled Manufacturer’s Guide to Developing Consumer Product Instructions1 that is still one of the most comprehensive guides available.

This guide discusses preliminary matters, such as planning the instructions for the intended audience and how to capture and maintain attention, how to make the text comprehensible, and how to motivate compliance. It provides some rules on how to present safety information and also on how to evaluate the instructions for comprehension.

A more recent document is ISO/IEC Guide 37:2012, entitled “Instructions for use of products by consumers,”2 which gives recommendations on the design and formulation of instructions for use of products by consumers. It contains more detailed suggestions than the CPSC guide on format, words, illustrations, tables, flow charts, etc. This guide also has a checklist for the evaluation of instructions for use.

For machinery sold in Europe, manufacturers should consult the Guide to application of the Machinery Directive 2006/42/EC3 which contains many requirements and suggestions for instructions. And the U.K. Department of Trade and Industry published a very useful document in November 1998 entitled Writing Safety Instructions for Consumer Products4 which surveyed consumers concerning their attitudes towards safety and reading instructions and included suggestions on how to encourage consumers to read instructions.

For medical devices, the U.S. Food and Drug Administration (FDA) published in 1993 Write It Right: Recommendations for Developing User Instruction Manuals for Medical Devices in Home Health Care,5 which is still on the FDA website and has useful information on communicating to regular product users.

And, lastly, in 1991, the American National Standards Institute issued the ANSI Z535 series of standards which dealt, in part, with on-product safety labels. This original standard did not provide any guidance on creating instructions that would accompany the product or any guidance on how to incorporate safety information into the instructions.

However, in 2006, the ANSI committee published a new standard in the ANSI Z535 series, Part 6, “Product Safety Information in Product Manuals, Instructions, and Other Collateral Materials,”6 to deal with the second part of the question, that is, how to incorporate safety information that is contained in on-product labels into instructions. The standard says that it:

“…sets forth a communication system developed specifically for product safety information in collateral materials. It incorporates elements of the graphical approaches used by other ANSI Z535-series standards into a common design direction selected to provide product safety information in an orderly and visually consistent manner.”

New Technology

There are some good company instruction manuals that you can see on the Internet that show what can be done with creativity and the use of technology.7 And Dr. Nathan Dorris described how technology, including the Internet, social media, video on demand, animation and dynamic displays, can be used in Twenty-First Century Warnings in a Global World: Another Tool in the Shed 8 that was presented at the Defense Research Institute’s 2013 Product Liability Conference.

Another example of the use of technology is the use of QR codes (a square barcode) on a label on a given product that takes the user to the instruction manual on the company’s website when it has been scanned on a smartphone. This, combined with a warning telling the user to read the manual and telling them how to access the manual electronically if the hard copy manual is not available, will be helpful in arguing that you did the best you could to provide this information to the actual user.

ANSI Standards on Instructions

As mentioned above, the ANSI Z535.6 standard was developed to deal with instructions. The standard provides requirements for the purpose, content, format, and location of four different kinds of safety messages:

  • Supplemental directives
  • Grouped safety messages
  • Section safety messages
  • Embedded safety messages

Supplemental directives direct readers to read the entire manual or to the safety information in the manual. They can be located on the cover of a manual or on the first page of a section in the manual. For example, while the standard doesn’t specify any language, a boxed message on the cover could say something like “Read this manual before using this product. Failure to follow the instructions and safety precautions in this manual can result in serious injury or death.” It should also say “Keep this manual in a safe location for future reference.”

Grouped safety messages are commonly referred to as a “safety section.” This section usually appears at the beginning of the manual, before or after the table of contents, and generally describes the risks involved in the use of the product and how to minimize or avoid them. It should include definitions of the signal words – Danger, Warning, and Caution – that are used on labels and in the manual, as well as reproductions of the labels in an illustration showing where they are attached to the product. If the product has symbol-only labels, the manual should describe the meaning of all symbols.

Section safety messages are included at the beginning of a chapter (i.e., maintenance or installation or operation) or within a chapter and do not specifically apply to a procedure. They include general messages such as “Do not perform maintenance without first reading this chapter and the safety precautions at the beginning of this manual” or “Failure to follow safety precautions in this chapter could result in serious injury or death.”

Embedded safety messages are contained within a specific procedure. For example, “To prevent burns, wear protective gloves when performing this procedure.”

While providing more interesting, compelling, and understandable safety information can be transmitted by video, CDs, and webcasts, in combination with written literature, this standard does not yet provide any guidance on more effective ways to transmit safety information.

A Few Interesting Issues

There is very little guidance in the law or the general warnings standards on when safety messages can be presented solely in the manual and not in the label, or when they can be on the label and not in the manual. Some product-specific standards provide specific requirements as to whether a warning must be placed on a product or in the manual. Without a specific requirement, it is up to a manufacturer to decide.

To me, the most logical analysis is whether the reader needs to see the information each time that he or she uses a product, or whether he or she can read the manual and then refer to that information later on as needed. Steve Hall from Applied Safety and Ergonomics and chair of the ANSI Z535.4 subcommittee said on this question:

“There is no hard and fast rule, but generally you want to try to provide messages in a way that gives people a reasonable chance to read them at an appropriate time. So, for tasks that are expected to involve referring to the manual (e.g., assembly, troubleshooting, maintenance, etc.), it is generally reasonable to provide safety messages in the relevant part of the manual, and not on a label. Conversely, for scenarios where the target audience is not reasonably expected to have access to a manual, a label may be more appropriate.”9

In addition, Professor David Owen addressed this issue in his product liability treatise:

“Whether adequacy requires in any given case that warnings be placed directly on the product involves a balance of the significance of the hazard, the user’s need for the information, the availability of a feasible means to place the warnings on the product, and other factors in the calculus of risk. If feasible, reason normally suggests that important warnings be placed on the product itself rather than in a pamphlet, booklet, or information sheet that can be damaged, lost, destroyed or stuffed in an office drawer.… Depending on the circumstances, however, a warning may still be adequate even if it is provided off the product in a manual or other writing.”10

(For a more extensive discussion of this topic, see my article “Location of Warnings: On Product or in the Manual?”11)

Another interesting issue involves whether a manufacturer needs to provide a hard copy of the instruction manual, or can instead provide the manual on a CD and include it with the product, or include a reference (website link or QR code) on the label that would allow a user to retrieve the manual from the manufacturer’s website? The ANSI standards don’t discuss whether a hard copy instruction manual is required, or whether the information can be provided in another way. The most likely reason is that most manufacturers provide their instructions in a hard copy.

However, there have been manufacturers of certain products that have recently asked about not providing a hard copy. Instead they want to include the instructions as an electronic file in a product or on a CD, or just provide a link or URL on a label that takes the user to an online manual. Examples of such products include cell phones, computers, televisions and certain machinery or equipment run by computers.

I have seen no law that discusses this issue and since virtually no laws or standards say one way or another (except as noted below), a manufacturer could omit the hard copy and argue that what it provided was adequate under the circumstances.

The ANSI Z535.6 subcommittee has been discussing the increased use of social media and company websites and how that relates to the required instructions. However, for now, the ANSI Z535.6 standard does not discuss the use of hard copies versus electronic instructions but merely mentions “supplemental directives,” which could include references to website links, QR codes and other recognized types of safety messages.

In Europe, the Guide to the EU Machinery Directive specifically requires that a hard copy of the manual accompany machinery. Until the Guide changes, manufacturers of machinery have no other choice. However, in March 2012, the European Commission approved the use of electronic forms of instructions with certain medical devices intended for use exclusively by medical professionals. Manufacturers of active implantable medical devices, implantable medical devices, fixed installed medical devices and medical devices fitted with visual display systems will be able to provide in electronic form use instructions previously provided on paper. Manufacturers providing electronic instructions will be required to include notices on product packaging on how to access the electronic forms of instruction, or provide supplementary printed instructions on how to access electronic instructions.

In a few years, the standard practice concerning electronic versus hard copy instructions could be much different.

Some Suggestions for Improving Your Instructions

We all read manuals at some time in our lives for products we buy and use. And all of us have been frustrated trying to understand and follow some of the information we are relying on in these manuals. Why is that?

Manuals are very hard to write. It is very difficult to anticipate every question that a user might have about a product, and to include every last step necessary to do something. Most of the time, the writer leaves out a crucial step, either because they forgot about it or because they thought it was obvious and they didn’t need to include it. The more familiar the writer is with the product, the more likely they will skip over something that is obvious to them, but possibly not to a user. The answer, of course, is to have users review the manuals and try to understand them and help improve them where necessary. The CPSC Guide and ISO standard provide a protocol for testing the understandability of instructions, with the CPSC Guide stating:

“Your instructions should be evaluated and tested to confirm that the instructions are accurate and meet the goals you set forth when planning them. Conducting fully comprehensive “real world” assessments are difficult, but are necessary to understand what will happen when your instructions are in the hands of actual consumers.”

In my experience, little of this type of testing is undertaken as it is very time consuming and potentially very costly, depending on the length and complexity of the instructions. It may not be necessary to do actual testing; however, companies should consider ways to at least confirm the understandability of the critical information in the manuals. At a minimum, having manuals reviewed by experienced technical writers and possibly legal counsel experienced in safety will be helpful as such individuals are trained to identify unclear and incomplete statements and inadequacies in descriptions of safety precautions.

Another problem with manuals is in their organization. It is sometimes difficult to organize a manual that flows in a logical fashion, goes from the general to the specific, and which includes information earlier that will be needed later. And, of course, most manuals aren’t read in order. Specific sections are referred to as needed by the reader.

So safety information in a user manual should be cross-referenced from section to section and possibly repeated multiple times in different parts of the manual where it is appropriate. Figuring out how to do that can be very difficult.

Another problem is with the language. Most companies have manuals written by engineers, many of whom struggle on a daily basis with the English language. And, even when companies employ technical writers, the writers may not be familiar enough with the equipment and how it is to be used safely and properly to ensure that adequate safety information is included and stated correctly. So using technical writers who possess some technical background or who can accurately interpret what engineers are saying can go a long way toward improving the understandability of the language.


Today, written literature can be combined with more interesting, compelling and understandable safety information that is transmitted via video, CDs, webcasts, podcasts and YouTube. The future challenge for manufacturers will be to provide information in a way that is more likely to be read or viewed and understood and followed. Manufacturers should review the various guides, standards and requirements for writing instructions and decide what level of resources to devote to improving these safety communications. They should experiment with some of the new technology and evaluate the consumer’s response.

Consumers don’t read instructions because they are boring or confusing or too long or incomplete. Breaking that cycle of inattention to this information will be helpful in enhancing the safe use of products.


  1. Manufacturer’s Guide to Developing Consumer Product Instructions, U.S. Consumer Product Safety Commission, October 2003. Available at (as of February 20, 2015).
  2. ISO/IEC Guide 37:2012 “Instructions for use of products by consumers,” International Organization for Standardization. Abstract available at (as of February 20, 2015).
  3. Guide to application of the Machinery Directive 2006/42/EC, Commission of the European Union, June 2010. Available at (as of February 20, 2015).
  4. “Government Consumer Safety Research: Writing Safety Instructions for Consumer Products,” U.K. Department of Trade and Industry (DTI), November 1998. Available at (as of February 23, 2015)
  5. Write it Right: Recommendations for Developing User Instruction Manuals for Medical Devices Used in Home Healthcare, U.S. Department of Health and Human Services, U.S. Food and Drug Administration, August 1993. Available at (as of February 20, 2015).
  6. ANSI Z535.6-2011, “Product Safety Information, Product Manuals, Instructions, and Other Collateral Materials,” American National Standards Institute, September 15, 2011. Available at (as of February 20, 2015).
  7. For example, see and
  8. “Twenty-First Century Warnings in a Global World: Another Tool in the Shed,” Boelhouwer, E., Dorris, N., and Fletcher, C., presented at DRI’s 2013 Product Liability Conference. Available at (as of February 23, 2015).
  9. Email correspondence with the author, August 2, 2012
  10. Products Liability Law Hornbook, Owen, David G., 2nd Edition, 2008, p.. 601, Thompson West, St. Paul, MN.
  11. “Location of Warnings: On Product or in the Manual?” Strictly Speaking, newsletter of the DRI Product Liability Committee, Summer 2008. Available at (as of February 20, 2015).

author_ross-kennethKenneth Ross is a former partner and now Of Counsel in the Minneapolis, Minnesota
office of Bowman and Brooke LLP, where he provides legal advice to manufacturers and other product sellers in all areas of product safety, regulatory compliance and product liability prevention, including safety management, recalls and dealing with the CPSC. He can be reached at 952-933-1195 or Other articles by Mr. Ross can be accessed at

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