Tag: self-checking

Peer Checking

Peer checking is a technique where two individuals work together to prevent errors before and during a specific action or task. Here are the key points about peer checking:

  • It involves a performer (the person doing the task) and a peer checker (someone familiar with the task who observes the performer).
  • The purpose is to prevent errors by the performer by having a second set of eyes verify the correct action is being taken.
  • The performer and peer checker first agree on the intended action and component. Then, the performer performs the action while the peer observes to confirm it was done correctly.
  • It augments self-checking by the performer but does not replace self-checking. Both individuals self-check in parallel.
  • The peer checker provides a fresh perspective that is not trapped in the performer’s task mindset, allowing them to potentially identify hazards or consequences the performer may miss.
  • It is recommended for critical, irreversible steps or error-likely situations where an extra verification can prevent mistakes.
  • Peer checking should be used judiciously and not mandated for all actions, as overuse can make it become a mechanical process that loses effectiveness.
  • It can also be used to evaluate potential fatigue or stress in a co-worker before starting a task.

Personally, I think we overcheck, and the whole process loses effectiveness. A big part of automation and computerized systems like an MES is removing the need for peer checking. But frankly, I’m pretty sure it will never go away.

Peer-Checking is the Check/Witness

Self-Checking in Work-As-Done

Self-checking is one of the most effective tools we can teach and use. Rooted in the four aspects of risk-based thinking (anticipate, monitor, respond, and learn), it refers to the procedures and checks that employees perform as part of their routine tasks to ensure the quality and accuracy of their work. This practice is often implemented in industries where precision is critical, and errors can lead to significant consequences. For instance, in manufacturing or engineering, workers might perform self-checks to verify that their work meets the required specifications before moving on to the next production stage.

A proactive approach enhances the reliability, safety, and quality of various systems and practices by allowing for immediate detection and correction of errors, thereby preventing potential failures or flaws from escalating into more significant issues.

The memory aid STAR (stop, think, act, review) helps the user recall the thoughts and actions associated with self-checking.

  1. Stop – Just before conducting a task, pause to:
    • Eliminate distractions.
    • Focus attention on the task.
  2. Think – Understand what will happen when the action is performed.
    • Verify the action is appropriate.
    • Recall the critical parameters and the action’s expected result(s).
    • Consider contingencies to mitigate harm if an unexpected result occurs.
    • If there is any doubt, STOP and get help.
  3. Act – Perform the task per work-as-prescribed
  4. Review – Verify that the expected result is obtained.
    • Verify the desired change in critical parameters.
    • Stop work if criteria are not met.
    • Perform the contingency if an unexpected result occurs.