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Author Archives: WorkingBear
Jul16
Youtube: QC 7 Tools – Fishbone (Cause & Effect Analysis) Diagram Introduction
Many of you might already know what a fishbone diagram is. But do you know how to actually draw one? And what should you watch out for when creating one? As the name suggests, the diagram looks like the skeleton … Continue reading
Jul10
Customer Complaint About Oil Contamination on PCB: Who’s the Real Culprit? (FTIR Analysis)
In the previous article, Workingbear mentioned a serious DOA (Dead on Arrival) customer complaint involving one of the company’s products. Most of the defective units had unresponsive keypads—specifically the 3, 6, and 9 buttons—and it was eventually traced back to … Continue reading
Jul03
[Case Study] Troubleshooting a Customer Complaint – Keypad Malfunction Caused by Oil & Powder Contamination on the PCB
This article shares a real case from Workingbear’s past experience dealing with an urgent customer complaint. One day, Workingbear was suddenly assigned to fly to a factory in China to “hunt for oil.” My manager even warned, “If you don’t … Continue reading
Jun26
What is Environmental Stress Screening (ESS)?
Environmental Stress Screening (ESS) is a method used to apply certain environmental and operational stresses—such as power on/off cycles, bias voltage, pressure, thermal cycling, and vibration—to new or repaired products (usually electronics or components). The idea is to expose hidden … Continue reading
Jun19
What Is EDX/EDS? A Beginner’s Guide to Elemental Analysis in Materials Science
Energy-Dispersive X-ray Spectroscopy (EDS or EDX) is a common, non-destructive technique used in the industry to quickly identify the elemental composition of a sample’s surface. In electronics manufacturing and material analysis, knowing what elements are present is critical for quality … Continue reading
