Which of the following is true of the poka-yoke approach used for mistake-proofing processes?
a. it was developed by kaoru ishikawa.
b. it to engage workers in continuous improvement activities.
c. most of the techniques of poka-yoke are expensive and extremely complex to implement.
d. it is ineffective in providing immediate feedback to the employees regarding the error in the process.

 b)It helps to engage workers in continuous improvement activities.

Explanation: Poke-yoke method was the technique to eliminate the mistakes that happen in a manufacturing process. It helps in avoiding the issues in the product and correcting those errors.

Mistake proofing is the mechanism of this methods that ensures about the product manufactured is safe from any failure and defects.It alerts the workers to improve the product through their working.

Other options are incorrect because it was developed by Shigeo Shingo , they had easy mechanism and feedback system did not told the workers about defects.Thus, the correct option is option(b).

b. It helps to engage workers in continuous improvement activities is the correct answer.

Explanation:

The Poka-Yoka approach or technique is a term originated in Japan aroun 1960 by an industrial engineer called Shigeo Shingo. It is an approach that helps develop techniques to correct possible defects and to prevent them. In other words, it is a useful technique for workers that are involved in the continuous process of improving activities.