A Guide to the Differences Between Quality Inspection and Quality Control
Although QI and QC are two different processes, they are very subtle differences. These are terms that are used in manufacturing but other business sectors benefit from it as well.
When items are manufactured, there is a need for quality inspection when the items are completed. Here trained inspectors use testing, tools, and standards of customers that are very demanding. QI identifies issues with products which they report to the accountable managers so that they can advise them on how to solve the issue.
In Quality control or QC, products are created and subjected to QI afterward. 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. QI detects problems with the finished product. It is possible to do QI if you are an inspector, a manager, a third-party testing services, or even customers do this.
As an example, in food processing facilities, poor quality items are set aside by QI so they don’t reach the market. There are rejected goods that are recycled. Checklists, visual guides, chemical testing, and other tools are used to sort poor quality products from good products quickly.
QC is a preventive measure. The work of QC is before inspection which helps to reduce the work of QI. When QC finds an error, malfunction or weakness, it seeks and fixes its sources.
It is important to get feedback so QC reduces or eliminates QI 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. Tools, talent, materials, machines, or even temperature and lighting at the work station are the sources of problems. In order for QC to perform well, there needs to be high-volume and high-quality feedback from QI.
Before the functions of QC and QI are isolated by most businesses. There is more interaction today between QI and QC where QI provides QC with important data so that businesses are free of error.
QI is done before shipment. To avoid shipment delays, QI should only be testing a limited amount of products. They say that this is a sample that is statistically-sound. Before delivery they check the samples for workmanship, safety, functionality, and performance. Buyers of these products also help in inspecting deliveries using their own set of standards. When there is customer feedback, there is an improvement of the supply chain. The cost of inspection must be weighed against the value of the produced goods. Take SafetyChain, this food quality management software will manage the costs as well as the process.