Initial Research Pathway.

Description of the German tunneling boring machine (Herrenknecht)

 -  Had an idea of using tunneling as the main subject due to familiarisation. 

- Started to find the specific model of the Tunnel Boring Machine (TBM).

-  Found the specific model via PUB contract website. 

- Found that PUB used the Herrenknecht Mixshield S-1144 Tunneling Machine (As shown above).

- Found out the functions and features of the TBM from Herrenknecht's website.

- Used gAI (ChatGPT) on what makes a good TBM using the prompt, "What makes a good Tunnel Boring Machine?".