People Procedures Computer No training Too much Wrong fee Too much coffee Too many grounds No training Wong sicher -- Dirty cups Bad coffee Bad sugar Brew time too long Oudered Lids don't buyuk Coffee not hot enough Puchats wat CUD working Material Equipment Based on the above diagram, which of the following statements is NOT true? The potential root cause of coffee not hot enough" is "warmer not working": In Six Sigma methodology, this diagram is used for analyzing causes of defect. "Outdated" is a potential root cause of "Too many grounds". Potential root causes of bad coffee are dirty cups, computer not updated, and wrong size filter. Causes of bad coffee can be grouped into four categories: people, procedures, material and equipment