There a large-scale infrastructure project involving the construction of a new urban transit system, including multiple subway stations, tracks, and associated facilities. The project was initially scheduled for completion in 36 months. However, a series of unforeseen delays emerged, including labor strikes, supply chain disruptions, and unexpected geological challenges. As a result, the project's timeline extended by an additional 12 months. Discuss: 1. How do these unforeseen delays impact the accurate allocation of costs? 2. What are the documentation process during the preparation of the construction project's final accounts? 3. The significance of transparent cost allocation and documentation in this context.