The article discusses how to choose the best method for building a short tunnel in tricky ground conditions. The researchers looked at factors like the type of ground, water levels, tunnel size, and costs. They studied a project in Edmonton where they used different tunneling techniques successfully. For a new tunnel project, they had to decide on the best method because of the short length, tough ground, and lack of local experience. They came up with strategies to reduce risks and attract more companies to bid on the project.