by Ken Snyder
“Assure Quality at the Source” is a principle in the Continuous Improvement dimension of the Shingo Model. Perfect quality can only be achieved when every element of work is done right the first time. If an error should occur, it must be detected and corrected at the point and time of its creation. This is done through error-proofing – i.e., taking countermeasures to prevent quality problems from occurring again.