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Poka yoke wikipedia
The devices could then detect when each component is removed from its dispenser, If a component is not removed, the sensing device alerts the assembler before he/she can move on to another unit.
Consequently, there are two basic types of poka-yoke systems.
Wikipedia has this to say : Hiding the internals of the object protects its integrity by preventing users from setting the internal data of the component into an roulette online game youtube invalid or inconsistent state.John Grout attributed defects to three sources: variance, mistakes, and complexity.The concept was formalized, and the term adopted, by Shigeo Shingo as part of the Toyota Production System.Ping me with the link, and I may respond.Dvorak gives the example of an operator who is responsible for tightening down six bolts on a product.Locations in the process with similarly positioned or configured parts, controls or tools are prime locations for poka-yoke devices.Anthony Inman further reading: Dvorak, Paul.Whenever complexity is hidden ( as is the case for Providers ) feedback time increases.A device on a drill counts the number of holes drilled in a work piece; a buzzer sounds if the work piece is removed before the correct number of holes have been drilled.Considering that compilation is the cheapest feedback mechanism, it's preferable to design APIs so that the code can only compile when classes are used correctly.This type of poka-yoke is useful for mass production environments with rapid processing as the device prevents mass production of scrapped material.Photo by: Oleg Verbitsky, poka-yoke is a technique for avoiding simple human error in the workplace.
In this case, poka-yoke provide an even more effective quality improvement tool than SPC.
Environments where training or turnover cost is high are prime locations for poka-yoke devices.
Table 1, examples of Poka-Yokes, contact Type, warning Type.The screw design was changed as shown in Table 1 to prevent the screwdriver from slipping.Regardless of degree of simplicity, all poka-yokes fall into one of three categories: contact methods, fixed-value methods, and motion-step methods.Plugins like alphanumeric can be a good choice here.If you search for Poka-Yoke you will find some nice examples such.5 floppy disks, where the shape of disks prevents people from inserting them improperly.Its most obvious usage is preventing an action to begin until all of the conditions necessary to perform that action are met.For example, at Brigham and Women's Hospital, a computer system is used to check and process doctors' prescriptions.If orientation is not critical, symmetrical designs can then be used to prevent defects.Before passing the product on, the tightening process is performed a fixed number of times (six).This is usually done by rejecting users input if invalid characters are detected.
Because of the possibility that service errors can be created by both the customer and the server, service poka-yokes are grouped into two categories: fail-safing the server and fail-safing the customer.