# NFT-Based Framework for Digital Twin Management in Aviation Component Lifecycle Tracking
## 3 Results
### The Workflow for Supply Chain Management Using NTF-Based Technology  
The workflow for supply chain management using an NFT-based system presents an innovative approach to tracking aircraft parts throughout their lifecycle (Figure 7) to create a secure, transparent, and immutable record of each part's journey from manufacture to retirement.  
Figure 7: Flowchart of the workflow for supply chain management.  
The process begins with part manufacturing. At this crucial initial stage, a unique NFT is created for each individual part. This digital token serves as the part's digital twin, containing all relevant information and acting as a secure, blockchain-based record of the part's entire history.  
Following manufacture, the part undergoes quality control. The results of these quality checks are recorded by updating the NFT, ensuring that the part's quality status is permanently logged. This step is vital for maintaining high safety standards in the aviation industry.  
The next stage is certification, where the part receives necessary approvals and certifications. Again, the NFT is updated to reflect this critical information, creating an indelible record of the part's compliance with industry standards and regulations.  
Once certified, the part moves to warehouse storage. The NFT is updated with location data and storage conditions, facilitating efficient inventory management and traceability.  
When a part is needed, it enters the order fulfillment stage. The NFT is updated to reflect that the part has been allocated to a specific order, enhancing supply chain visibility.  
The shipping stage follows, where the NFT is updated with shipping details, including carrier information and expected delivery dates. This allows for the real-time tracking of the part's movement through the supply chain.  
Upon arrival at its destination, the receiving process occurs. The NFT is updated to confirm receipt, including date, time, and the condition of the part upon arrival.  
Next, the part undergoes inspection. The results of this inspection are recorded in the NFT, maintaining a clear record of the part's condition at each stage of its journey.  
A critical decision point follows: \"Passes inspection?\" If the part passes, it moves to inventory, and the NFT is updated accordingly. If it fails, the part is returned to the supplier, with the NFT recording this rejection and return process.  
From inventory, the part proceeds to installation. The NFT is updated with installation details, including the specific aircraft and location where the part is installed.  
Once installed, the part enters the in-service tracking phase. Here, the NFT is continually updated with usage data, performance metrics, and any issues encountered during operation.  
During the in-service tracking, there is an ongoing assessment: \"Maintenance required?\" If maintenance is needed, the part enters the maintenance stage, and the NFT is updated with details of the maintenance performed. After maintenance, the part returns to in-service tracking.  
If no maintenance is required, the part continues in service until it reaches the end of its operational life, at which point it moves to part retirement. The NFT is updated one final time to record the retirement, effectively closing the digital record of the part's lifecycle.