The fast track method in project management is a technique that involves overlapping the phases of engineering, procurement, and construction. Instead of completing these phases sequentially (which is typical in traditional project management), fast tracking allows for simultaneous work on these phases with appropriate overlap. The goal is to reduce the overall project duration by eliminating delays and streamlining the work into a logical and efficient sequence. This method is often used in projects where time is a critical factor.

Option B describes a traditional sequential approach, not fast tracking.

Option C outlines the process of project scheduling and planning, which involves sequencing activities but does not address the simultaneous execution of phases.

Option D focuses on schedule revision and constraint identification, not the simultaneous execution characteristic of fast tracking.

Thus, A. Simultaneous working engineering, procurement, and construction is the correct answer.