Generalized case scenario: identifiers, values, chronological observation order, and analysis-stage boundaries are site-created while preserving the investigative pattern.
What the data supports. Lateness is concentrated in part families B and D under the M/R characteristic combination. Period 4 is weakest overall. Family D shows an older issue; family B deteriorates later.
What it does not prove. The coded characteristics or the supplier caused the lateness. That requires supplier process knowledge and additional evidence.
Questions to take to the supplier
- What changed at the beginning of period 4 for these part families and this characteristic combination?
- Do these deliveries share a production route, resource, planning rule, material flow, or dispatch process?
- At which milestone does delay first appear: confirmation, material readiness, production start, completion, or dispatch?
- Why did part family D show lateness earlier while family B deteriorated later?
- What was different in the delivery from the same focus group that still arrived on time?
- Which milestone timestamps or operating classifications should be examined next to test these explanations?