Consultants and organizations tend to name their own unique approaches to quality control – some of which are widely used: QC is a systematic control of various factors that affect product quality. It depends on the 4M conditions, i.e. man, machine, material and method or working conditions and measuring instruments, etc. There are several methods to measure the performance of quality control. A quality control table is a graph that shows whether the sampled products or processes meet the intended specifications – and if not, to what extent they deviate from those specifications. When each chart analyzes a specific attribute of the product, it is called a univariate chart. When a chart measures deviations across multiple product attributes, it is called a multivariate chart. Some companies set up internal quality control services when defining what quality control is. They do this to monitor products and services, while others rely on external bodies to track products and performance. These controls may depend largely on the company`s industry. For example, due to the strict nature of food inspections, it may be in a company`s best interest to sample products in-house and verify these results in a third-party laboratory. No consumer wants to risk using a product that could put them at risk or not meet expectations. A company`s reputation, reliability and efficiency are threatened when quality control is neglected.
Testing a product can also play a role in marketing and sales, as consumers can trust it more. There are several methods of quality control. These include an X-bar chart, Six Sigma, 100% inspection mode and Taguchi method. Inspection and statistical quality control (SQC) are the two main quality control techniques. The inspection verifies the performance of the items according to the predefined specifications. It includes a regular review before, during and after the end of the process. It can be divided into two types: centralized and soil inspection. Statistical quality control is based on the laws of probability. It controls the quality of the production within the tolerance limits by means of a sampling process. Learn how to define what quality control is with Simplilearn`s postgraduate program in Lean Six Sigma, offered in partnership with the University of Massachusetts Amherst. This Lean Six Sigma certification program helps you gain key skills to lead transformation projects by improving overall quality and achieving the best results.
The continued use of Six Sigma and Lean Six Sigma (another form) occurs in the 21st century and is used by Microsoft and local governments. Six Sigma uses a five-factor approach (DMAIC) to define, measure, analyze, improve and control to help organizations identify, solve and resolve quality control issues. Quality control within a company can only help ensure product quality and the overall success of a company. The quality control environment influences employees` attitudes in the workplace and creates a sense of personal responsibility for the products and the company as a whole. Quality control can be done in a variety of ways, from training staff to creating data-driven tools to test products and set standards. Quality control methods help create a safe working environment and product safety that benefits customers and businesses. One aspect of quality control in food production would be monitoring ingredient specifications, reviewing supplier lists, and ensuring that the facility where the food product is manufactured is hygienic. QA is sometimes expressed with QC as a single expression: Quality Assurance and Control (QA/QC). Ultimately, there are two key quality control objectives: (1) to ensure that products are as consistent as possible and (2) to minimize the errors and inconsistencies they contain.
Quality assurance can be defined as “a part of quality management that aims to provide assurance that quality requirements are met”. The trust that quality assurance provides is twofold: internally for management and externally for customers, government agencies, regulators, certifiers and third parties. Another definition is “all planned and systematic activities that are implemented in the quality system and that clearly provide assurance that a product or service meets the quality requirements”. At its core, quality control requires attention to detail and research methodology. Reduction of production costs: The process used for quality control verifies the production of items that do not meet quality standards, corrects problems and reduces production costs.
