Use event time for business truth
Explain why event time is usually the right basis for business analytics windows.
The move: choose the clock before you choose the chart. A real-time pipeline has multiple clocks. Event time records when the real-world action happened. Processing time records when the computation handled it. If those clocks diverge, the wrong choice can make a normal delay look like a business spike. Event Time Use event time when the question is about the business sequence: orders per minute, fraud attempts per card, vehicles arriving at a depot, or sessions starting on a site. Processing Time Use processing time when the question is about the system: how fast records are flowing, how backed up…
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