Strengths and Weaknesses of Queuing Theory Queuing models necessarily involve approximations and simplification of reality Results give a sense of order of magnitude, changes relative to a baseline, promising directions in which to move Closed-form results essentially limited to"steady state"conditions and derived primarily(but not solely for birth-and-death systems and"phase"systems Some useful bounds for more general systems at steady state Numerical solutions increasingly viable for dynamic systemsStrengths and Weaknesses of Queuing Theory • Queuing models necessarily involve approximations and simplification of reality • Results give a sense of order of magnitude, changes relative to a baseline, promising directions in which to move • Closed-form results essentially limited to “steady state” conditions and derived primarily (but not solely) for birth-and-death systems and “phase” systems • Some useful bounds for more general systems at steady state • Numerical solutions increasingly viable for dynamic systems