The order cancellation rate has suddenly spiked. How do I break down the causes by inventory, payment, and customer service?

When the order cancellation rate suddenly spikes, you shouldn't just look at the total number. One day, our cancellation rate doubled; operations thought customers just didn't want to buy, but after breaking it down, we found that half were due to automatic cancellations caused by out-of-stock items. My approach is to first group by cancellation reason: customer-initiated, payment failure…