1) Contact methods detect contact between a sensing device and a part or object in a process to identify errors. For example, contact limit switches can identify if a cylinder is missing. 2) Counting methods use sensors to count the number of times a part is used or a process is completed and only release the part when the correct count is reached. 3) Motion-sequence methods use sequencing to help operators select the right parts for each step of a process through indicators.

1. By:
Pankil Shah

2. Examples

3. 1.) Contact Method
 A contact method functions by detecting whether a sensing
device makes contact with a part or object within the
process.
Missing cylinder;piston fully
extended alarm sounds
Contact Method using limit
switches identifies missing
cylinder.
Cannot proceed
to next step.
Cylinder present
Methods of using Poka-Yoke

4. 2.) Counting Method
 A sensor counts the number of times a part is used or a
process is completed and releases the part only when the
right count is reached.

5. 5
3.) Motion-Sequence Method
 In order to help operators select the right parts for the right
step in a process the “sequencing” aspect of the motion-step
method is used.
Indicator BoardMachine