Key Questions
The following key questions are answered in this module:
How do you define Poka-Yoke?
Poka-Yoke can be defined as the implementation of foolproof mechanisms to avoid inadvertent errors or mistakes. These mechanisms are implemented to eliminate assembly product defects not only by preventing them, but also by forcing correction of an error the moment it occurs.
What is a contact Poka-Yoke method?
Contact Poka-Yoke methods are used to control physical attributes, such as shape, size, orientation, or color. It can also be used to verify that an object is actually present.
What is a fixed-value Poka-Yoke method?
Fixed-value (or constant number methods) are mainly used in processes where there is repetition. Repetition can lead to operators acting in an automated mode, without noticing defects.
What is a step Poka-Yoke method?
Step methods are mainly used for processes that have a defined sequence of steps to be performed by the operator in order to complete the task. They function by either alerting the operator when a mistake is about to be made, or by preventing the mistake from being made. This type of Poka-Yoke ensures that the correct procedure is followed.
What is important to consider when implementing Poka-Yoke?
When considering implementing Poka-Yoke, it is important to have a clear understanding of the defects to be prevented, pinpoint the step of the process in which the defect is being generated, isolate the root cause of the defect so appropriate prevention and detection mechanisms can be considered, and implement the selected mechanism and monitor performance to ensure that the potential of a defect recurring has been effectively prevented.