# Emergency Repair Scheduling Model for Road Network Integrating Rescheduling Feature
## 5 Conclusions and Recommendations  
Major natural disasters in recent years have not only awakened people's awareness of disaster prevention, but have also highlighted the importance of the post disaster emergency repair problem. This study investigates resource allocation and the sequence of the emergency repair scheduling problem in post disaster recovery practice and develops a novel scheduling model to solve the emergency repair scheduling problem for the road network. In the resource allocation setting of the model, this study considers the type of repair resources, and each equipment resource is the basic unit of minimum resource allocation. Taking the benefits of flexible resource allocation in the RCPSP framework, it can be observed that the repair resources can be allocated in a more flexible way in the repair projects to accelerate recovery speed, compared with the traditional VRP approach adopted in previous studies. Moreover, this study introduces a rescheduling feature into the proposed scheduling model, so that it can be updated in response to unexpected changes of project contents (e.g., new disaster point and new supporting resource), with minimal or no change to the original schedule.  
This research currently considers only excavators and bulldozers as equipment resources, and the resource combination and corresponding repair duration of each damaged  
Figure 9: Diagram of the repair process after new resource point is added (Case 2).  
road section are currently limited to two groups, but the model can actually consider the setting of multiple numbers. Therefore, for future work, other repair equipment can be considered in resource practices and increase the number of resource and duration combinations in order to expand the scale of the model. Additionally, in this study, the travel time of equipment resources as the duration of transit activity is set as a fixed value in the model and is not affected by traffic flow or other factors, but the actual post disaster conditions may change due to road accidents or peak hours. More assessment of the travel time parameter should be conducted for further investigation. Moreover, a future research direction could consider building a post disaster emergency scheduling system that provides (1) an interface for inputting repair project information and (2) an interface for outputting emergency scheduling results and related diagrams and tables. Users can directly input information about the location and workload of each disaster point, the resources required for repair activities, the types and quantities of resources to which each maintenance unit can devote for repair works, and the transit routes of equipment resources.  
Conceptualization, S.-S.L., W.T.C.; formal analysis, S.-S.L., Y.-H.H. and M.F.A.A.; investigation, S.-S.L.; writing--original draft preparation, S.-S.L. and M.F.A.A.; writing--review and editing, S.-S.L. and M.F.A.A.; supervision, S.-S.L. All authors have read and agreed to the published version of the manuscript. This research received no external funding.  
Not applicable.  
Data Availability StatementData generated or analyzed during the study are available from the corresponding author by request.  
The authors declare no conflict of interest.