Untitled

graph TD;
  A[Project Planning and Design]
  B[Site Preparation]
  C[Assembling the TBM]
  D[TBM Launching]
  E[Tunnel Excavation]
  F[Segment Installation]
  G[Tunnel Lining]
  H[TBM Retrieval]
  I[Tunnel Completion]

  A --> B
  B --> C
  C --> D
  D --> E
  E --> F
  F --> G
  G --> H
  H --> I