An automated real-time diagnostic system designed to replace the cutting tool of

Question

An automated real-time diagnostic system designed to replace the cutting tool of a drilling machine at optimum times was designed by testing the system using a broad range of machining conditions. How many different machining conditions were possible if the variables were as follows:

 Two workpiece materials (steel and cast iron)
 Two drill sizes (0.125 and 0.25 inch)
 Six drill speeds (1250, 1800, 2500, 3000, 3750, and 4000 revolutions per minute)
 Seven feed rates (0.003, 0.005, 0.0065, 0.008, 0.009, 0.010, and 0.011 inches per revolution)

Explanation / Answer

2*2*6*7= 168 different conditions.

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