Fast-track approach compresses the schedule by sequencing the start of construction on underlying project elements (e.g. foundation, basic supporting structures) before final design is complete for interior or adjacent elements.
Fast-tracking is not a method of delivery, rather, it’s a management strategy within delivery methods.
While often successful in achieving schedule reductions, problems on fast-track contracts can create a domino effect on follow-on contracts for the project.
Fast-track is more successful on projects that are straightforward and have a high level of predictability.