A control alarm on the multi-line NXD-10 goes off when its separate production lines change widget-manufacturing speeds at different rates. Due to bottleneck constraints, the widgets are damaged if, on average, the NXD-10 produces widgets faster than 110% of its normal rate. In order to track quality control, company policy requires that all differential speed changes be reported by NXD-10 operators to upper management. Since every reported differential speed change reduces employee bonuses, NXD-10 operators in practice only report differential changes that will be discovered later, i.e., due to damaged products.
If the statements above are true, which of the following describes a situation in which an NXD-10 control alarm would go off, but the incident would not be reported to upper management?
A. Gauges show a sharp and uniform increase in widget production
B. Gauges show an overall increase in widget production to twice the normal rate-with some lines increasing production rapidly, others slowly.
C. Gauges show that widget production has risen sharply to 120% of the normal rate; yet one NXD-10 line had a slower production rate than it did previously.
D. Gauges show that widget production has for the most part dropped at a constant rate; yet one NXD-10 line sped up slightly.
E. Gauges show a significant and uniform decrease in widget production.
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answer: D
I chose C, I don't see the difference between choice C and D, since C also refers to the different speed changes reported by the NXD-10 operators to upper management. Why C is wrong?
If the statements above are true, which of the following describes a situation in which an NXD-10 control alarm would go off, but the incident would not be reported to upper management?
A. Gauges show a sharp and uniform increase in widget production
B. Gauges show an overall increase in widget production to twice the normal rate-with some lines increasing production rapidly, others slowly.
C. Gauges show that widget production has risen sharply to 120% of the normal rate; yet one NXD-10 line had a slower production rate than it did previously.
D. Gauges show that widget production has for the most part dropped at a constant rate; yet one NXD-10 line sped up slightly.
E. Gauges show a significant and uniform decrease in widget production.
____________________________________________________________________________________________________
answer: D
I chose C, I don't see the difference between choice C and D, since C also refers to the different speed changes reported by the NXD-10 operators to upper management. Why C is wrong?
