In capacity planning, what does a steady increase in the ratio of peak-to-average demand over historical periods typically indicate? (difficulty: hard)

When analyzing revenue per employee (RPE) in workforce productivity, which metric would indicate the highest efficiency for a software company with 100 employees? (difficulty: hard)

In sales funnel analysis, which metric best indicates the efficiency of your sales process when comparing the performance of different months? (difficulty: hard)

When analyzing a database containing multi-valued attributes in customer contact information, which normalization form specifically addresses this issue? (difficulty: medium)

A company's sales data has a mean absolute percentage error (MAPE) of 15% using simple exponential smoothing and 8% using double exponential smoothing. What can be concluded about the nature of the data? (difficulty: hard)