Type of information and PCS actions for the Path Alteration process
| Code | TOI | PHASE | ACTOR | TARGET PHASE | ACTION IN PCS |
| 23 | Preparation of alternative offer is in progress | Active Timetable | LIM | PA Conference | PA start (use case: alternative path is available) |
| 21 | No alternative available | Active Timetable | LIM | PA Conference | PA start (use case: no alternative path is available) |
| 29 | Withdrawal | PA Conference, PA offer | LIM | Active Timetable | Withdraw Path Alteration (dossier returns to Active Timetable, original IDs are kept) |
| 24 | Alternative offer triggered by IM | PA Conference | LIM | PA Offer | Submit Path Alteration offer |
| 23 | Preparation of draft alternative offer is in progress | PA Conference | IM | General timetable update | |
| 23 | Preparation of draft alternative offer is in progress | PA Conference | IM | Set the acceptance indicator to yellow in PA Conference as IM | |
| 2 | Harmonisation – accepted | PA Conference | IM | Set the acceptance indicator to green in PA Conference as IM (preparation of draft alternative offer is accepted) | |
| 3 | Harmonisation rejected | PA Conference | IM | Set the acceptance indicator to red in PA Conference as IM (preparation of draft alternative offer is rejected) | |
| 18 | Alternative offer accepted | PA Offer | LA | Active Timetable | Accept Path Alteration offer |
| 26 | Alternative offer rejected (without revision) | PA Offer | LA | Active Timetable | Reject Path Alteration offer |
| 28 | Alternative offer rejected (revision required) | PA Offer | LA | Path Elaboration | Ask for Offer adaptation |
| 2 | Harmonisation – accepted | PA Offer | RA | Set the acceptance indicator to green PA Offer as RA (offer/final offer accepted) | |
| 3 | Harmonisation – rejected | PA Offer | RA | Set the acceptance indicator to red in PA Offer as RA (offer/final offer rejected) |
