Statistical process control (SPC) is a critical method in quality control that employs statistical techniques to supervise and control a process. With its help, processes can operate more efficiently, producing more specification-conforming products with less waste. One of the critical components of SPC is the set of seven basic quality tools. In this blog post, we will dive into each tool and how it can help optimize any business process.
Demystifying the Fishbone Diagram
One of the most powerful tools in this arsenal is the fishbone diagram, also known as the cause-and-effect or Ishikawa diagram. The beauty of the fishbone diagram lies in its ability to identify multiple potential causes for a problem or effect. The diagram encourages structured brainstorming sessions and immediately categorizes ideas into valuable segments.
The Practical Use of a Check Sheet
Another handy tool is the check sheet. Think of it as a structured, prepped form for data collection and analysis. The check sheet is a versatile data collection and analysis tool that can be customized for various purposes. Whether you’re tracking product defects, analyzing customer complaints, or assessing project tasks, a check sheet can be your go-to tool.
Keeping a Pulse on the Process with Control Chart
Control charts are pivotal in studying process changes over time. Data points on this chart are plotted in time order, which always features a central line for the average and lines for the upper and lower control limits. It’s a quick, graphical representation of a process that helps you stay on top of any changes or deviations.
Histogram: A Snapshot of Frequency Distribution
Frequency distribution analysis becomes simple and visually appealing with the use of histograms. Although similar to a bar chart, a histogram has essential differences and shows how often each value in a data set occurs. It’s a helpful tool when analyzing the distribution and frequency of certain events or variables within your process.
Keep an eye out for the next post to learn about the remaining three tools of SPC, the Pareto chart, scatter diagram, and stratification. These are equally critical to mastering the art of Statistical Process Control.