: Traditionally, construction only begins after a design is 100% complete. In a fast-track model, construction starts as soon as enough design data is available (e.g., foundation work begins while the roof is still being designed).

: To meet urgent needs for infrastructure or commercial occupancy, making time the most critical project factor.

In the construction industry, is a technique where project phases—such as design and construction—are implemented concurrently rather than sequentially.

The evolution of fast track protocols after oesophagectomy - PMC

In medicine, "fast track" often refers to . This multidisciplinary approach aims to reduce surgical stress and get patients back to their normal lives faster.

: Because final costs and full designs are often unknown during the process, it requires high-level coordination and carries a higher risk of revisions if early phases don't align with later designs. 2. Healthcare: Fast-Track Surgery and Recovery