iSixSigma

Standard Operating Sheet (SOS)

Definition of Standard Operating Sheet (SOS):

While a standard operating sheet may at first appear to be a simple piece of paper, it has the potential to unlock so much more for your organization.

Overview: What is a standard operating sheet? 

A standard operating sheet (SOS) is a document that outlines all elements for a specific operation. This includes each step involved in the particular process as well as the approximate amount of time taken. If an operator is working with a machine, these times can be further divided into Manual or Robot time estimates. 

3 benefits of standard operating sheets 

Okay, it’s a piece of paper…so what? Glad you asked! This isn’t just any piece of paper, it’s a piece of paper with benefits that will help improve your organization’s output.

1. Standardization 

As the name suggests, one benefit of a standard operating sheet is that it brings standardization to a process. While traditionally used in Lean manufacturing, standard operating sheets can be used anywhere there exists a process that needs to be followed the same way each time for best results (ex., changing the toner on the office printer). 

By having the process steps and time estimates posted at their point of use, any operator can see how long a job will take and perform the process in a repeatable way. This reduces variation in the process and helps minimize error.

2. Visualization 

Standard operating sheets typically contain a diagram of the workstation where they are posted. This helps show how the specific operation needs to be performed and can draw attention to areas where extra care must be taken to avoid injury or mistakes. WIth a quick glance, it is easy for someone to gain understanding of the work to be done, regardless of their level of experience with the equipment.

3. Employee engagement

A standard operating sheet documents all of the elements of a given operation based on the best way we know how to perform them right now. This is a great starting point for training employees on how to properly conduct the process, then they can refer to the more detailed standard work with any questions they may have. 

As employees perform a given operation, they may find new ways to make the job simpler, easier, or faster. Having the standard operating sheet posted as a visual baseline allows operators to then have conversations with their team lead or shift manager around ways that the process can be improved.

How to create a standard operating sheet 

Now that we’ve seen the benefits standard operating sheets can provide, let’s look at what it takes to write one.

1. Select the operation

To determine whether an operation would benefit from a standard operating sheet, consider criteria such as difficulty of the process, inconsistencies seen in time or quality, and accident rates.

 2. Analyze the operation

It’s helpful to observe the process in action to record the current situation. Additional information about the operation can be gathered from historical data, employee interviews, and process flowcharts.  

3. Develop the best method

Before creating a standard operating sheet, be sure to develop the best method for conducting the operation. Question what is currently being done and if there are ways to reduce waste. Test out the method to make sure operators are able to perform the tasks safely and effectively.

4. Write the standard operating sheet

Outline the main steps and the tasks associated with each one. Include the amount of time each task takes and any key points to remember around safety or quality. Include images of the work area and process steps as well.  

An industry example of standard operating sheets 

Imagine this: You walk into an automotive manufacturing plant. There are cars everywhere in various states of assembly and separate lines dedicated to a different phase of production. 

In the midst of this chaos, you wonder how any of the employees on the floor can keep track of what goes where. Good thing each area has a handy-dandy standard operating sheet, like this one: 

Image source: www.researchgate.net.  

Looking at this standard operating sheet, it is clear exactly what steps need to be taken to configure the base of the automobile as well as how long each part of the operation takes. 

Having this standard in place not only allows operators to make sure they are performing the steps correctly, it also allows them to check their work quality to make sure it meets the requirements.

3 best practices when thinking about standard operating sheets 

As standard operating sheets can be such a powerful resource, there are some things to keep in mind when it comes to using them in your organization.  

1. Keep it simple

Since a standard operating sheet is, in fact, a sheet of paper, it is important to simplify how the process information is presented so that the operation can be easily understood. If there is too much text, it is easy for the message of how to perform the operation to get lost. Include pictures wherever possible to help simplify the steps and show (rather than tell) how they need to be completed.

2. Go to Gemba

When creating a standard operating sheet, it is important to outline the work as it actually happens. The only way to ensure that the standard operating sheet will reflect the appropriate steps and time estimates is by observing the operation and workstation setup. To do this, go to Gemba — the place where work activities are performed.

3. Update periodically

Since there is a time element associated with standard operating sheets, it is important to periodically review them to make sure the time approximations are still applicable. If employees engage in continuous improvement and change how an operation is performed, the steps and times outlined on the standard operating sheet will likely change as well.

Frequently Asked Questions (FAQ) about standard operating sheets

1. Is there a specific format for standard operating sheets? 

The short answer is no! While there are specific elements that should be included on the standard operating sheet, it is important to find a format for presenting this information that works for your organization. 

There are a lot of free templates available online that can serve as a starting point. From there, engaging with the employees who perform the operation will help highlight what format and information will be most useful. 

2. How do you apply standard operating sheets to an office environment?

Even non-manufacturing processes have standard ways the work needs to be completed. 

For something like a customer order, it is important that each sales representative understands what information is needed and that all information gets filled out correctly. A standard operating sheet can be used to provide guidance around what a given field of information means, where that information can be found, and how long it typically takes to collect it.

3. Will all employees follow the standard operating sheet?

If a standard operating sheet has been effectively created, it will reflect the best way the work can be done. This makes employees’ jobs easier and less confusing, so they will benefit from adhering to the standard operating sheet. 

If an organization finds that employees are not following the standard operating sheet, some investigation needs to take place to determine the root cause of nonconformance. Perhaps the standard operating sheet is outdated, or it outlines some steps that are dangerous to perform. 

Understanding why employees are doing something that goes against the standard is critical to make sure an organization can find the best solution to achieve success and make sure all employees are trained on that new standard.

What’s the key thing to remember about standard operating sheets? 

If nothing else, remember this: Standard operating sheets outline all elements of a specific operation. By understanding the process steps and amount of time they take, operators can ensure they are performing a given task the right way and help train others to ensure consistent results.

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