Repeatability and reproducibility (R&R) are important factors to consider for manufacturing companies around the world. During an audit, the company’s ability to carry on doing what they usually do is measured to determine if there are any anomalies or problems that need to be addressed. Today, there are numerous software available that enable companies to carry out Gage R&R, but still it is important to understand its basics.
Here’s your step-by-step guide to Gage R&R:
Addressing the Variables
The main reason why Gage R&R has gained importance for businesses is because it tracks the main variables in the production measuring process. The company’s capability and ability to repeat and reproduce determines how effectively they can continue completing the processes they perform. The idea being Gage R&R is to gauge the extent of the variation in the measuring processes. If the variation is beyond a certain level, then the business will have to take the necessary steps to reduce it or control it.
This is important because it covers any and every production measuring process the business uses. However, it is also crucial that you understand that this is not necessary for every gauge. For instance, there can be a large number of gauges for a small number of processes.
The main personnel involved in the Gage R&R process are the ones who measure during the production processes. For instance, your business may employ quality inspectors or you can engage the head of production. It all depends on the situation that you are dealing with at that time. In fact, it is advised that you use substitutes during the initial stages when you are trying out, and then engage the actual personnel.
At the end of the day, it doesn’t matter who gathers the data that you will use for conducting the Gage R&R. However, it is recommended that you employ a calibration technician. The technician will be on hand to handle any queries and at the same time be able to use the software or any tool you are using for the process. It goes without saying that the personnel you engage for Gage R&R should have complete command over the measurement processes. You will have to guide them about the part that you need them to measure.
Your Step-By-Step Guide to Gage R&R
You have to keep the cost of the trial in mind when deciding the parameters. It is up to you to determine the number of parts, operators and measurements that you will use. The factors that you can consider when making a decision include, besides cost, the situation in which you are conducting the Gage R&R and the number of measurements required to get accurate results. Once this phase is completed, you have to gather the data you will need for the measurements. For this, it is important that the data is arranged randomly.
The Calculation Method
You can choose from three options when it comes to a calculation method. Generally, businesses opt for the Average and Range method. This is often recommended when you are using spreadsheets for the process. It provides accurate results, but, at the same time, is not the ideal method if you are using software. The second method is Range, but it is only utilized in certain scenarios. The third method is the one that requires the most effort. This is called the Analysis of Variance (ANOVA). If you are using a tool or software, ANOVA is the way to go.
Depending on the calculation method you use for Gage R&R, you will have to draw the conclusions accordingly.
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