# Management System According to ISO/IEC 17025: Method Validation
## 2 Materials and Methods
These points establish the guidelines to be developed in this methodological section. Meeting these requirements is essential for validating a non-regulated or proprietary test method. 1. Equipment Performance Verification according to the Requirements Established in the Method:  
Load Capacity: The load capacity of an anchor bolt is crucial as it determines its effectiveness in controlling underground instability. It is essential to differentiate between the support element before insertion and the one applied to the rock mass (the anchor). The anchor's load capacity is measured once it is placed within the rock mass. Therefore, it is important to understand that the concept of anchorage arises from the interaction between the rock mass, the steel bolt, and the applied encapsulant mix (mortar/concrete/resin), such as cement cartridges, resin cartridges, and cement grout injections. Equipment elements:  
1. Equipment castle;
2. Hydraulic cylinder;
3. Safety chain;
4. High-pressure hose;
5. Pressure indicator gauge;
6. Hydraulic pump;
7. Butterfly-type safety nut. These equipment elements are crucial for accurately measuring and verifying the load capacity of the anchor bolt in accordance with the method's requirements. It is crucial to note that to fulfill this initial section, the equipment, pressure gauge, and hydraulic pump must undergo calibration by an accredited calibration provider. The calibration interval should align with the anchor performance range during the pull strength test, which typically falls between 1 and 15 tons. Additionally, it is essential to verify that the calibration remains valid on the test date. By meeting these requirements, there is ample evidence to verify the equipment's performance according to the criteria established in the method. \begin{table}
\begin{tabular}{c c c} \hline
**ISO/IEC 17025:2017** & **Description** & **Interpretation and Guide EMA MP-FE005-13** \\ \hline
7.2.2 & Method validation & Method validation \\ \hline  & & For tests involving physical measurements, the following steps should be undertaken: \\  & & 1. Verify equipment performance against the requirements specified in the method. \\  & & 2. Ensure laboratory facility compliance and that environmental conditions align with the method’s specifications. \\
7.2.2.1 & & 3. Validate performance data by conducting reproducibility and duplication studies, ensuring they met predefined acceptance criteria. \\  & & 4. Provide evidence from inter-laboratory comparisons to further support the reliability and accuracy of the measurements. \\ \hline \end{tabular} Source: own elaboration taken from ISO/IEC 17025:2017 [1] and EMA MP-FE005-1.  
\end{table} 
Table 1: _Cont._Agreement on Laboratory Facilities and Environmental Conditions with Method Specifications:  
The actual load capacities provided by the anchor have been documented based on the characteristic geomechanical conditions of the reservoir (environmental conditions) and design requirements. These activities must be conducted for each characteristic geomechanical domain of the underground project, distinguishing between dominant and random domains in each underground area [12]. Regarding laboratory facilities, testing is conducted at prevailing locations, always prioritizing the most accurate security measures. It is essential to ensure that the laboratory facilities and environmental conditions align with the specifications outlined in the method to maintain consistency and reliability in testing procedures. Repeatability and Reproducibility (r&R) Study in Compliance with Acceptance Criteria through Analysis of Performance Data:  
Errors in any measurement system, and consequently in any test, stem from factors related to accuracy (the difference between the measured value and the true value of an item) or precision (variations observed when the same item is repeatedly measured with the same device).