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Quality Control Charts


Quality control charts, also known as control charts or Shewhart charts, are statistical tools used in finance and other industries to monitor and analyze variations in a process. They aid in identifying trends, fluctuations, and errors, as well as determining if a process is consistent and stable. By visually displaying data points over time, quality control charts help evaluate and maintain performance levels to ensure quality standards are met.


The phonetic pronunciation of the keyword “Quality Control Charts” is:/ kwɒlɪti kənˈtroʊl ʧɑrts /

Key Takeaways

  1. Quality Control Charts are crucial tools used to monitor and analyze the production process, maintaining the quality of products and services. They help identify trends, variations, and stability in the processes and enable management to make informed decisions.
  2. There are two main types of Quality Control Charts: Variable Control Charts (used to monitor the continuous data measurements) and Attribute Control Charts (used to evaluate attributes or categories of data). Examples include the x-bar chart, R-chart, p-chart, and c-chart, among others.
  3. Quality Control Charts allow early detection of problems in a process, enabling corrective actions before serious issues arise. They contribute to increased customer satisfaction, reduced production costs, and improved overall product quality by ensuring adherence to the set quality standards.


Quality Control Charts are crucial in the business and finance sector as they serve as an essential tool for monitoring and controlling the performance and stability of various processes. These charts enable organizations to identify and track deviations, trends, and patterns, which allows for early detection and rectification of potential problems before they escalate. By maintaining process quality and consistency, businesses can enhance customer satisfaction, drive operational efficiency, and reduce costs associated with defects and rework. Overall, Quality Control Charts play an invaluable role in the continuous improvement of process performance and contribute significantly to the long-term success and profitability of organizations.


Quality Control Charts serve as an integral component in the world of finance and business, primarily driven by their ability to enhance a company’s proficiency and productivity. The core purpose of these charts is to monitor, control, and improve the quality of processes by identifying variations that may be occurring within production or manufacturing. As a visual tool, Quality Control Charts enable businesses to efficiently analyze and assess their operational performance, ensuring that their outputs consistently adhere to pre-determined specifications and desired quality standards. As a result, this facilitates continuous improvement throughout the organization and helps minimize the risk of producing defective products or delivering inadequate services. The utilization of Quality Control Charts significantly contributes to a company’s overall gains, as they minimize wasted resources and optimize production efficiency. Furthermore, these charts help businesses pinpoint the root causes of defects or discrepancies and act as an early warning system for potential process drifts. By distinguishing between common and special causes of variation, management can implement necessary corrective actions or prevent potential issues from escalating further. In doing so, this fosters systematic problem-solving, drives higher customer satisfaction, and ultimately bolsters the organization’s competitiveness and profitability within the market. Simply put, Quality Control Charts prove to be an invaluable asset in maintaining operational excellence and guiding businesses towards sustained growth and success.


Quality Control Charts are essential tools used in business and finance to monitor and visualize a manufacturing or production process’s performance. They help organizations identify trends, variations, and possible defects in a specific process. Here are three real-world examples of business processes that would benefit from using Quality Control Charts: 1. Automotive ManufacturingQuality control charts can be used in automobile manufacturing to monitor specific parameters of various components, such as engine parts, transmissions, and body assemblies. For example, measurement data from engine piston diameter could be fed into a control chart to evaluate whether the pistons are being produced within the acceptable tolerance range. This allows the company to identify problems in the production process and make adjustments to maintain consistent product quality. 2. Food and Beverage ProductionIn the food and beverage industry, quality control charts can be used to monitor factors such as weight, temperature, and moisture content during production. For example, a bakery could use control charts to track the weight of their bread loaves, ensuring the weight remains within an acceptable range. If the control chart signals that many loaves are being produced outside the specified weight range, the bakery can identify the root cause and correct the issue to maintain product quality. 3. Pharmaceutical ManufacturingQuality control charts are particularly critical in the pharmaceutical industry, where product quality and consistency have significant implications for consumer safety. Control charts can monitor the potency, purity, and weight of drug products throughout the manufacturing process. For example, an over-the-counter pain reliever’s active ingredient might be monitored using control charts to ensure that the concentration remains within a specified range. This helps manufacturers identify issues, maintain consistency, and ensure the continued production of safe and effective medications for consumers.

Frequently Asked Questions(FAQ)

What are Quality Control Charts?
Quality Control Charts, also known as Process Control Charts or Shewhart Charts, are graphical tools used in the field of finance and business to monitor and control the quality of a process or product. These charts help determine the performance of a manufacturing process, identify variations, and maintain a consistent level of quality.
What is the primary purpose of Quality Control Charts?
The primary purpose of Quality Control Charts is to visually track and analyze the performance of a process over time. This helps businesses identify possible causes of variations, allowing them to make data-driven decisions for continuous improvement.
What are the common components of a Quality Control Chart?
A typical Quality Control Chart is made up of the following components:1. Horizontal Axis: Represents time or sample number.2. Vertical Axis: Represents the process variable, such as response time or product dimension.3. Central Line: Represents the process average or target value.4. Upper Control Limit (UCL): Represents the upper boundary for process variation.5. Lower Control Limit (LCL): Represents the lower boundary for process variation.6. Data Points: Plotted points representing actual measurements of the process variable.
What are the types of Quality Control Charts?
There are two main types of Quality Control Charts: variable control charts and attribute control charts. Variable control charts, such as X-bar and R charts, monitor continuous data like dimensions or weights. Attribute control charts, such as p and c charts, monitor categorical data like defective or non-defective items.
How do I interpret a Quality Control Chart?
A Quality Control Chart is typically considered to be in control if the data points are randomly distributed within the control limits (UCL and LCL), without patterns or trends. If there are non-random patterns, trends, or data points beyond the control limits, the process may be considered out of control and requires investigation.
How do Quality Control Charts help in process improvement?
Quality Control Charts help identify special-cause variation (unusual events causing deviation from the norm) and common-cause variation (routine variations within the process). By identifying special-cause variations, businesses can take corrective actions to eliminate the root cause, leading to improved process quality and reduced variability.
Can Quality Control Charts be used for any industry?
Yes, Quality Control Charts are versatile tools that can be adapted to various industries such as manufacturing, healthcare, finance, and customer service. They can be used to monitor and improve the quality of products, services, or processes within any business setting.

Related Finance Terms

  • Statistical Process Control (SPC)
  • Control Limits
  • Process Variability
  • Six Sigma
  • Continuous Improvement

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