Constraint types considered in optimisation
| Constraint type | Constraint name | Explanation |
|---|---|---|
| Spatial | Object | An object can appear only once in an intervention programme during the 5-year planning period. |
| Spatial | Subnetwork | The optimisation is solved for each subnetwork sequentially. |
| Spatial | Inclusion | Intervention candidates and objects requiring a priority intervention must be included in the intervention programme regardless of the results of the cost–benefit analysis. Certain interventions may be postponed in the temporal allocation step if there is insufficient budget. |
| Spatial | Exclusion | In case certain objects should not be considered as part of a grouping, these can be explicitly excluded using an exclusion strategy. |
| Temporal | Budget | The sum of intervention costs in a given year may not surpass the defined annual budget limits. |
| Temporal | Coordination | Interventions that are coordinated with other networks must be executed in the planned year of coordination. |
| Temporal | Priority | Priority interventions must be executed in the specified year. |
| Constraint type | Constraint name | Explanation |
|---|---|---|
| Spatial | Object | An object can appear only once in an intervention programme during the 5-year planning period. |
| Spatial | Subnetwork | The optimisation is solved for each subnetwork sequentially. |
| Spatial | Inclusion | Intervention candidates and objects requiring a priority intervention must be included in the intervention programme regardless of the results of the cost–benefit analysis. Certain interventions may be postponed in the temporal allocation step if there is insufficient budget. |
| Spatial | Exclusion | In case certain objects should not be considered as part of a grouping, these can be explicitly excluded using an exclusion strategy. |
| Temporal | Budget | The sum of intervention costs in a given year may not surpass the defined annual budget limits. |
| Temporal | Coordination | Interventions that are coordinated with other networks must be executed in the planned year of coordination. |
| Temporal | Priority | Priority interventions must be executed in the specified year. |