Know more about the 3 best quality control methods in the manufacturing industry
Published 4 May 2023
Modern manufacturing SOPs (standard operating procedures) vary depending on the industry, nature of the business, business size, and branding. What highly successful corporations have in common, however, is their use of the following tried and tested quality control and assurance methods; six sigma, lean and kaizen.
After Motorola pioneered the use of Six Sigma in the mid-80’s, several companies across a wide range of industries have since adapted it as a standard business practice.
Six Sigma is a problem-solving method that aims to reduce defects and manage variations from set internal specifications. The term “Sigma” in statistics refers to the standard deviation from the mean or average of a process data set.
As a concrete example, a process needs to have a maximum of only 3.4 defects per one million opportunities to be considered of “Six Sigma Quality.”
In order to obtain Six Sigma certification, management must first determine if they’re trying to improve an existing product or process or create a new one.
The DMAIC methodology is used to improve existing processes that fail to achieve set goals:
Define customer needs and expected results.
Measure relevant empirical data such as current performance.
Analyze available data and do a root-cause analysis to accurately identify the real problem instead of its symptoms.
Improve the current process by conceptualizing solutions from the expected output, current performance, and identified root cause.
Control the new process to avoid deviations beyond standard limits. This step may be done as many times as needed until the process has been optimized to meet project goals.
By contrast, the DMADV methodology is used to come up with new processes or products of
Six Sigma Quality:
Define goals for product design and functionality based on customer needs and the organization’s identity.
Measure the viability of ideal production rate, product capabilities, and possible obstacles or causes of failure.
Analyze objectives to develop optimal design.
Design a product or service based on the available information.
Verify design through rigorous testing.
As Toyota rose to become one of the top automotive manufacturers in the world, it also popularized Lean (or Lean Manufacturing), a management philosophy later adapted by other companies.
The primary focus of Lean is to identify and eliminate “waste” in the production process in order to improve overall efficiency. “Waste” is described as steps and/or arrangements deemed unnecessary by logical analysis and which must be discontinued.
More specifically, Lean aims to identify the presence of and eliminate the “Seven Deadly Wastes” detailed below:
Though numerous companies apply Lean principles to their operations, their techniques and tools of choice may vary. Below are some of the most widely used tools and techniques for practicing Lean:
Why did the team fail to meet the quota?
Why did we run out of products?
Why did we fail to produce 100% of the product demands?
Why did our materials expire?
Why did we fail to check expiry dates?
Kaizen is a Japanese term that means “change for good,” but is more loosely translated in the west as “continuous improvement.” What makes it different from other process improvement methods is that it aims to involve the entire organization, from top management to the assembly line workers, in its implementation. Having a Kaizen Culture in your organization means each individual, regardless of rank, is empowered to look for opportunities to improve every day, no matter how small.
Eliminate manual tasks and streamline your operations.
Listed below are some of the most common Kaizen implementation tools used by companies:
SIPOC (Suppliers, Inputs, Process, Outputs, Customers)
SIPOC is a mapping tool with the primary objective of ensuring clarity in process workflows. By doing so, unnecessary activities are discontinued, accountability becomes clear, and the overall process is optimized for maximum efficiency.
Performing a gemba walk means that executives, on a regular basis, will walk around the actual space where the work is being done (be it the production floor of a call center or a manufacturing plant) in order to observe objectively, understand the process, ask questions, and identify opportunities for improvement. Its goal is to ensure that upper management learns how things are actually done, instead of simply commenting on and reviewing individual work performance.
The 8D Report or the Eight Disciplines Model is a problem-solving technique used to contain, resolve, or prevent issues identified in a product or process by quality engineers and other responsible personnel. Initially only used by the automotive industry due to Ford’s influence, it is now widely used in a variety of industries, including manufacturing, healthcare, and retail, with great success. The 8D Report is a comprehensive method that aims to eliminate problems by identifying and attacking its root cause(s). It achieves this by utilizing a combination of expertise, data analysis, management tools, and data validation.
The SafetyCulture Platform is a mobile-first application that digitizes processes and streamlines operations to improve daily workflows. SafetyCulture facilitates quality control through digital inspections, enabling businesses to conduct regular checks and assessments to ensure compliance with standards and minimize the risk of errors or oversights.
In addition, SafetyCulture provides real-time reporting and analytics capabilities, empowering businesses to track and monitor their quality control performance. Armed with this information, organizations can pinpoint areas that require improvement and take corrective action to maintain consistent quality.
Download these templates from SafetyCulture:
SafetyCulture Content Team
The SafetyCulture content team is dedicated to providing high-quality, easy-to-understand information to help readers understand complex topics and improve workplace safety and quality. Our team of writers have extensive experience at producing articles for different fields such as safety, quality, health, and compliance.
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