A Work Instruction (WI) is a detailed document that describes how to perform a single, specific task. While a Standard Operating Procedure covers an entire process with multiple steps, a work instruction zooms in on one step and provides the granular detail needed to execute it correctly.
Work Instruction vs. SOP
The key distinction is scope:
- An SOP covers a complete process (e.g., "How to onboard a new employee")
- A Work Instruction covers a single task within that process (e.g., "How to set up their email account")
Think of it as a hierarchy: a process contains procedures (SOPs), and procedures contain individual tasks (work instructions).
When to Use Work Instructions
Work instructions are most valuable when:
- A task is technically complex and requires precise execution
- Multiple people perform the same task and consistency is critical
- Errors in a specific step could have serious consequences
- New team members need to learn detailed tasks quickly
Structure
A typical work instruction includes:
- Task name and purpose
- Prerequisites (tools, access, materials)
- Detailed steps with specific parameters, exact values, and expected results
- Visual aids (photos, annotated screenshots, diagrams)
- Safety warnings relevant to this task
- Quality checkpoints to verify the task was done correctly
Work Instruction Examples
Here are three examples showing the scope and detail level of a work instruction:
Manufacturing: Calibrating a Digital Scale Steps include the exact calibration weights to use, the sequence of buttons to press, the acceptable tolerance range, and how to log the calibration date. The SOP for "Daily Quality Control Setup" references this work instruction at the calibration step.
IT: Configuring SSO for a New Employee Steps include the identity provider settings, the exact fields to fill in, the group assignments to apply, and the expected login screen the employee should see when setup is complete. The SOP for "Employee Onboarding" links to this at the access provisioning step.
Food Service: Sanitizing the Prep Station Steps include the specific cleaning solution concentration, the contact time required, the correct wiping pattern, and the visual inspection criteria. The SOP for "Kitchen Closing Procedure" references this at the sanitization step.
Each example covers one task, not a full process. That is the defining characteristic of a work instruction.
How to Write Work Instructions
Writing a good work instruction follows a similar process to writing an SOP, but at a more granular level:
- Observe the task being performed by an experienced person
- Note every micro-step, including the ones that seem obvious
- Write each step starting with a verb and include exact values
- Add screenshots, photos, or diagrams at critical points
- Test the instruction with someone who has never done the task
For a complete walkthrough, see our guide on how to write a standard operating procedure. The same principles of clarity, testing, and ownership apply to work instructions.
Creating Work Instructions with Credia
Credia's Voice to SOP and Screen to SOP features work just as well for work instructions. Record yourself performing the task, and the AI generates a structured document with steps and screenshots. Store work instructions alongside your SOPs in a single knowledge base so they stay connected and searchable.