Tracer bullets are utilized tospear with the existing structural design or the existing set of best practices. The primary reason of a tracer bullet is to inspect how an end-to-end procedure will work and examine its viability. Tracer ammunition, which is a fraction of bullet built with a minute pyrotechnic charge in their bottom. It is an imaginary detective, just like an alter ego of Calvin in the comic book of Calvin and Hobbes. It is also used in Scrum (software development)to explain a proof-of-concept deliverable Pathfinder (library science) – a term for those pathfinders fashioned by the Library of Congress.