# NFT-Based Framework for Digital Twin Management in Aviation Component Lifecycle Tracking
## 3 Results
### The Workflow for Quality Assurance Using NTF-Based Technology  
The workflow for quality assurance using an NFT-based system presents an approach to ensuring and maintaining quality standards in the aviation industry, creating an immutable, transparent record of all quality-related processes and decisions (Figure 11).  
Figure 11: Flowchart of the workflow for quality assurance.  
The process begins with quality standard definition, where specific quality criteria are established. At this stage, an NFT is created to represent these standards, serving as a digital, tamper-proof record of the quality requirements.  
Simultaneously, supplier quality management is initiated to monitor and ensure the quality of inputs from external sources. This process feeds into the overall quality assurance system, with its findings and actions recorded in the NFT.  
The defined standards then move to process implementation, where they are put into practice. The NFT is updated to reflect how the standards are applied in real-world operations.  
Following implementation, a quality check is performed to assess adherence to the defined standards. The results of this check are recorded by updating the NFT, ensuring a transparent record of quality assessments.  
If the quality check reveals that standards are not met, the process loops back for further refinement and implementation. If standards are met, the process moves to quality approval, and the NFT is updated to reflect this positive outcome.  
Parallel to these processes, an audit cycle is in place. Audit planning schedules regular internal audits, the results of which are recorded in the NFT. If an internal audit is passed, an external audit is conducted for independent verification. The outcomes of both internal and external audits are meticulously logged in the NFT.  
After the external audit, there is a decision point regarding whether the certification is maintained. If maintained, the process moves to recertification, updating the NFT to reflect the renewed certification status. If it is not maintained, a certification suspension status is recorded in the NFT, and the process moves to address the audit findings to rectify the issues.  
Customer feedback is also integrated into the quality assurance process. This feedback is analyzed and incorporated into the continuous monitoring phase, with relevant insights and actions recorded in the NFT.  
The continuous monitoring phase is a critical component of the workflow. It involves the ongoing surveillance of processes, products, and services. The NFT is regularly updated with monitoring data, creating a real-time record of quality performance.  
If issues are detected during continuous monitoring, an issue investigation is initiated, followed by root cause analysis. The findings from these stages are recorded in the NFT, providing a clear trail of problem identification and diagnosis.  
Based on the root cause analysis, corrective actions are implemented. These actions and their outcomes are logged in the NFT, demonstrating the responsive nature of the quality assurance system.