Wednesday 26 November 2014

Ways To Improve Quality Production Using Acceptance Sampling

By Patty Goff


Several questions are often raised on how the organization confirms that its products supplied are compliant with the set quality standards. In most cases companies relays on checking in coming materials. This is further compared with their quality standards as well as supply generated documents such as certificate of analysis. Based such analyzed results, the individuals charged with inspections can either reject or accept a shipment. Mostly organizations use acceptance sampling approach as outlined by MIL STD.

Evidently, some organizations have also embraced the preference use of modern sampling strategy as fronted by American National Standards Institute and American Society for Quality. However, regardless of the strategy selected by the organizations, proponents of quality assurance ascertains that the approach should be geared towards minimizing the cost of inspection, preventing the entry of low quality input from production and ensuring risk management.

Most quality professional views this strategy as just another inspection tool. It is essential to expand resource inspection to better production by inspection of critical received goods. By not inspecting such materials, the organizations might just basically cross their corporate fingers with a hope that their products will meet the set standards.

It occupies a middle ground between no inspection and a hundred percent inspection. These techniques have been viewed just as another set of inspections tools. In addition, most quality professionals confers the strategy as unworthy of being associated with quality improvement tool as the end result of all such statistical is a stand alone, meek accept or reject conclusions. Such assertion was perceived to be true however, in the recent times; such sampling strategy has been deemed to be more effective means of improving quality.

For example, in a situation where the company inspector uses such approaches in checking incoming products or the materials as such information obtained are further used for making decision on accepting or rejecting conclusion. Through this, it will be possible to notice the actual defect as well failure might be noted along with the name of the supplier, product code and various important traceability elements associated with the supply unlike if the inspectors perform an inspection using ANSI/ASQ Z1.4.

Through this historical data will be made available by supplier, other traceability elements and products. Such quality data can only be achieved through this sampling strategy. If so, histograms, Pareto charts, control charts and other statistical analysis could be analyzed receiving inspections data.

Through this information, defect between suppliers could be compared. It also gives an opportunity to confirm the control or lack of control processes by the supplier. This information could be used to collaborate work with the assistance of the supplier to help the vendor improve the quality of its manufacturing processes and supplied products.

This approach serves as a compliment strategy for improvement of quality using the accept or reject conclusions. Previously, unknown vendors could just quantify their products and such information used in cost reduction in the supply chain and quality improvement. Alternatively, it can be done at a little or no cost to organizations which have already implemented the use of ANSI/ASQ measures.




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