What is the primary disadvantage of the job evaluation system• Know and understand what happens under the Railway Labor Act (RLA), once the National Mediation Board (NMB) declares an impasse • Know and understand why are mediators unlikely to influence the direction of an outcome • Know and understand how does mediation facilitate settlement • Know and understand what do the four major types of strikes have in common • Know and understand what firm might find it feasible to persist to operate using supervisors and other nonproduction workers • Know and understand the definition and purpose of a whipsaw strategy and be able to identify an example