Comparing Quality Inspection and Quality Control
There are many subtle differences between QI and QC. Although these terms are used mostly in the manufacturing sector, most other businesses also benefit from it.
Quality inspection is performed at the end of every manufacturing process. Here trained inspectors use testing, tools, and standards of customers that are very demanding. Quality issues are being identified by QI after which they inform the managers who are accountable and advise them on how to solve the problem.
Products are created while doing QC and they are subject to QI when it is finished. The person in charge of QC identifies and corrects issues during the development and manufacturing process. QC will be very successful if the company is focused on providing quality products as their core value and goal.
The process of QI and QC are complicated processes. In QI the finished product is inspected. It is an inspector, a manager, a third-party testing service, or the customers who do QI.
As an example, in food processing facilities, poor quality items are set aside by QI so they don’t reach the market. Some recycle these rejected goods. Checklists, visual guides, chemical testing, and other tools are used to sort poor quality products from good products quickly.
In QC, poor quality products are prevented from being produced. During the process of QC, it already removes items that are not good so it does not reach QI any more. The main focus of QC is to find and fix sources of error, malfunction, or weakness.
Feeback is very important and so QI can be eliminated by correcting things at the point of failure. QC inspects all process points so that problems are found and they are then repaired and reconfigured. Problems usually lie in the tools, talents, materials, machines, or even the temperature and lighting at the workstation. If there is feedback from QI which is high-volume and high-quality, then QC can perform well.
Most business used to isolate the QC and QI functions. In order to help make businesses free of error, there is already more interaction and cooperation where QI feed QC with important data.
QI is done before shipment. If QI testing is limited to just a segment of the products, then shipment delays can be avoided. And they assume that this represents a statistically-sound sample. This sample is checked for workmanship, safety, functionality, and performance before delivery. Those who purchase these products also help in the process by inspecting deliveries as they arrive for their own set of standards. This customer feedback helps to improve the management of the supply chain. Business owners must weigh the cost of inspection against the value of the produced well. If you want to manage the costs as well as the processes, then you should use SafetyChain, a food quality management software.