Tracer bullet can be used as spike with the current architecture or the current set of best practices. The purpose of a tracer bullet is to examine how an end-to-end process will work and examine feasibility.
Tracer ammunition, which is a part of bullet built with a small pyrotechnic charge in their base
It is a fictional detective, alter ego of Calvin in the comic strip Calvin and Hobbes
It is used in Scrum (software development)to describe a proof-of-concept deliverable
Pathfinder (library science) – a term for those pathfinders produced by the Library of Congress.
Scrum Tutorial