---
title: Domain Model
created: 2026-04-08
updated: 2026-04-08
status: evolving
tags: [domain, models, relationships, lifecycle]
sources: [app/Models/, app/Enums/, database/migrations/]
---

# Domain Model

21 Eloquent models organized in 8 layers, with 14 enums for type safety.

## Entity Relationship Overview

```
Thema (strategic theme)
  └── Speerpunt (focus area)
        └── Project (innovation project)
              ├── Fase (lifecycle phase)
              ├── Risico (risk)
              ├── Commitment → Actie (action)
              ├── Besluit (decision) → Commitment
              ├── Budget → Besteding (expenditure)
              ├── Document ← Tag (M:N)
              ├── LessonLearned
              ├── Afhankelijkheid (dependency, Project ↔ Project)
              ├── Overdrachtsplan (handover plan)
              │     ├── Criterium
              │     └── Acceptatie
              └── ProjectUser (team membership, pivot)

User ──── Role (M:N)
AuditLog (append-only, all mutations)
KennisArtikel ← Tag (M:N)
```

## Layer Details

### Strategic Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **Thema** | naam, beschrijving, prioriteit, periode | has many Speerpunten |
| **Speerpunt** | naam, beschrijving, eigenaar, status | belongs to Thema, has many Projects |
| **RoadmapItem** | titel, start, eind, type, status | belongs to Thema |

### Project Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **Project** | naam, beschrijving, eigenaar_id, status, prioriteit, startdatum, streef_einddatum | SoftDeletes, belongs to Speerpunt + User (eigenaar), has many of everything |
| **Fase** | type (enum), status (enum), startdatum, einddatum, opmerkingen | belongs to Project |
| **Risico** | beschrijving, impact, kans, mitigatie, eigenaar | belongs to Project |
| **Afhankelijkheid** | type, beschrijving, status | self-referential N:M between Projects |

### Commitment Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **Commitment** | beschrijving, eigenaar_id, deadline, status, bron | belongs to Project + Besluit, has many Acties |
| **Actie** | beschrijving, eigenaar_id, deadline, status, prioriteit | belongs to Commitment |

### Governance Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **Besluit** | titel, beschrijving, datum, type, status, onderbouwing | belongs to Project, has many Commitments |
| **Budget** | bedrag, type, periode, status | belongs to Project, has many Bestedingen |
| **Besteding** | bedrag, beschrijving, datum, categorie | belongs to Budget |

### Knowledge Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **Document** | titel, type, inhoud, versie, auteur, datum, **embedding** (vector) | belongs to Project + Fase, M:N Tags |
| **KennisArtikel** | titel, inhoud, tags, auteur, datum, **embedding** (vector) | M:N Tags |
| **LessonLearned** | titel, inhoud, project, fase, tags | belongs to Project + Fase |
| **Tag** | naam, categorie | M:N with Documents, KennisArtikels |

### Handover Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **Overdrachtsplan** | type, status, eigenaar_rnd, eigenaar_ontvanger | belongs to Project, has many Criteria + Acceptaties |
| **Criterium** | beschrijving, status, verificatie | belongs to Overdrachtsplan |
| **Acceptatie** | datum, door, opmerkingen, status | belongs to Overdrachtsplan |

### Auth Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **User** | name, email, password, phone, afdeling, functie, 2FA fields | has many ProjectUsers, can own Projects/Commitments/Risicos |
| **Role** | naam, beschrijving, permissies | M:N with Users |
| **ProjectUser** | project_id, user_id, rol (enum) | pivot table |

### System Layer
| Model | Key Fields | Relationships |
|---|---|---|
| **AuditLog** | user_id, action, entity_type, entity_id, payload (JSON) | append-only |

## Innovation Lifecycle Phases (FaseType enum)

```
signaal → verkenning → concept → experiment → pilot → besluitvorming → overdracht_bouwen → overdracht_beheer → evaluatie
```

Special statuses (ProjectStatus only, not FaseType):
- `geparkeerd` — temporarily halted
- `gestopt` — permanently stopped
- `afgerond` — completed

## Key Design Decisions

1. **Dutch naming** — all models, fields, enums use Dutch names to match domain language
2. **Soft deletes on Project only** — projects are never hard-deleted
3. **Embedding vectors on Document + KennisArtikel** — pgvector columns for semantic search
4. **ProjectUser pivot with role** — team membership is role-typed (Eigenaar, Lid, Reviewer, Stakeholder)
5. **FaseType maps 1:1 to first 9 ProjectStatus values** — `FaseType::tryFrom($projectStatus->value)` is used for phase transitions