The customer service department defined the problem as "the number of customer complaints in the East China region has risen 30% for two consecutive months," listed three causes (unstable scheduling, outdated systems, insufficient training) and completed the causal chain, and also verified one by one the phenomena that should accompany each cause. Then he directly promoted the new training system to all six major regions. Which of the following evaluations is the most accurate?

Answer: C

• AThe analysis skipped precisely defining the result; it should also specify which customer groups the complaints are concentrated in for the definition to be complete.✗ Wrong. The result already specifies the object (complaints in the East China region), the time (two consecutive months), and the degree (rise of 30%), fully meeting the requirements of the first step. This option corresponds to the misconception that 'definition can be infinitely refined,' mistaking an already-achieved step as missing.
• BThe analysis skipped seeking evidence; it should list supporting and potentially refuting evidence for each cause simultaneously.✗ Wrong. The stem explicitly states that he verified one by one the phenomena that should accompany each cause, which is exactly what the fourth step requires. This option corresponds to the misconception that 'checking for associated phenomena is not the same as seeking evidence,' mistakenly treating a completed step as missing.
• CThe analysis skipped small-scale verification; before full promotion, he should first select one region and only change the training factor as a trial.✓ Correct. Defining the result, listing causes, drawing the chain, and seeking evidence have all been completed, but before full-scale promotion he did not first conduct a low-cost experiment in a single region with only one factor changed. If the direction is wrong, the loss would be amplified simultaneously in six regions, which is exactly what the fifth step aims to prevent.
• DThe analysis skipped drawing the causal chain; it should explain through which intermediate steps insufficient training leads to the rise in complaints.✗ Wrong. The stem indicates that he has completed the causal chain and ensured that intermediate links are explained, so the third step is done. This option corresponds to the typical problem of 'stopping at the cause noun,' but the scenario does not exhibit this problem.