Fig. 1:

List of professionals interviewed_
| S/N | Description | Code | Interview mode |
|---|---|---|---|
| 1 | An executive with the state ministry of infrastructure | Executive -1 | Face-to-face via note-taking |
| 2 | An executive with the state ministry of infrastructure | Executive -2 | Face-to-face via note-taking |
| 7 | PPP consultant with the federal ministry of finance | Consultant | Zoom (recording not allowed) |
| 8 | Director at PPP agency | Director | Zoom (recording not allowed) |