# Precise Mission Process Control Based on a Novel Dual-Code Group Network Plan Diagram  
[PERSON]  
1 Air Traffic Control and Navigation School, Air Force Engineering University, Xi'an 710051, China; [EMAIL_ADDRESS] (A.W. ); [EMAIL_ADDRESS] (Q.S. ); [EMAIL_ADDRESS] (H.L. ); [EMAIL_ADDRESS] (R.Y.) 2 Equipment Management and Unmanned Aerial Vehicle Engineering School, Air Force Engineering University, Xi'an 710051, China; 133224452400163.com 2  
[PERSON]  
2 Equipment Management and Unmanned Aerial Vehicle Engineering School, Air Force Engineering University, Xi'an 710051, China; 133224452400163.com 2  
[PERSON]  
1 Air Traffic Control and Navigation School, Air Force Engineering University, Xi'an 710051, China; [EMAIL_ADDRESS] (A.W. ); [EMAIL_ADDRESS] (Q.S. ); [EMAIL_ADDRESS] (H.L. ); [EMAIL_ADDRESS] (R.Y.) [PERSON]  
1 Air Traffic Control and Navigation School, Air Force Engineering University, Xi'an 710051, China; [EMAIL_ADDRESS] (A.W. ); [EMAIL_ADDRESS] (Q.S. ); [EMAIL_ADDRESS] (H.L. ); [EMAIL_ADDRESS] (R.Y.) [PERSON]  
1 Air Traffic Control and Navigation School, Air Force Engineering University, Xi'an 710051, China; [EMAIL_ADDRESS] (A.W. ); [EMAIL_ADDRESS] (Q.S. ); [EMAIL_ADDRESS] (H.L. ); [EMAIL_ADDRESS] (R.Y.) [PERSON]
the capacity to describe the logical relationship between missions. The load diagram is a useful tool for managers to manage resources and the ability of executors. However, it is unable to describe the time process of a mission nor the logical relationship between missions. In conclusion, the primary limitation of Gantt charts and load diagrams is their inability to depict the cooperative relationship between missions. Consequently, these tools are not well-suited for large-scale plans with intricate cooperative elements. The NPD is a plan management method based on a network model. Its advantage is that it can clearly show the interrelationships between the sub-missions in the plan, making it more suitable for describing large and complex plans than Gantt charts and load diagrams. The core technologies of NPD include the critical path method (CPM) [15] and the plan evaluation and review technology (PERT) [16; 17], which are also the core technologies for cooperative manufacturing and enterprise resource management. Nowadays, the decision critical path method (DCPM) [18] and graphical evaluation review technique (GERT) [19] have been developed. However, when describing the mission process of a large and complex plan, the traditional NPD has three main shortcomings. Firstly, it can only show the mission duration, but not the start and end moments of the mission, and cannot track the time process of the mission in real time. Secondly, the NPD can only have a unique global start node and a unique global end node, which causes conflicts when there are multiple executors in the group carrying out their plans in parallel. Thirdly, the NPD requires manual sorting of missions in a logical manner and encoding of a dual-code before calculating the time parameters of each mission. Furthermore, it lacks automated mission sorting and automatic encoding methods, which is not applicable to large group missions. Consequently, in order to be able to characterize large and complex group plans, we improved the traditional network plan diagram and designed a group network plan diagram with a timeline. Mission process control is the real-time monitoring of mission execution. In the event of disturbances and accidents in the mission, the plan must be adjusted in time to eliminate disturbances. As missions involve more factors, are more delicately organized, and have stricter requirements on execution time, mission process control has become an important part of mission management. In the event of a lack of control over the mission process, deviations from the predetermined plan may result in delays, which can lead to significant economic losses. Therefore, it is essential to develop an accurate and effective mission process control method to avoid the phenomenon that the mission starts and the plan fails.