May13
MRB Decision-Making and Cosmetic Quality Evaluation for Plastic Parts

post on May 13, 2026

製造工廠的MRB會議及塑膠件品質判斷

When Workingbear first joined an electronics final assembly factory as a product/process engineer, I often had to attend MRB (Material Review Board) meetings. From time to time, people would come to me asking me to evaluate rejected parts and decide whether they could be waived for use. Otherwise, the production line could face material shortages or even a shutdown.

What I disliked the most back then was dealing with rejected plastic parts. It was always a tough call. Unfortunately, in final assembly, more than 70% of rejected materials were related to plastic components… not exactly a fun situation.

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Management, Manufacture, Plastic, Process, Quality     WorkingBear    Views (118)     comment (0)

May06
Why Electronics Assembly Factories Need IQC: Three Key Purposes Explained

post on May 6, 2026

Why Electronics Assembly Factories Need IQC: Three Key Purposes Explained

In most electronics assembly organizations, there is a function called IQC (Incoming Quality Control). The primary purpose of IQC is to screen incoming materials to ensure they meet drawing specifications, preventing defective parts from directly entering the production line. This helps avoid defective output and even potential line shutdowns.

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Quality, Role & Responsibility, SPC     WorkingBear    Views (107)     comment (0)
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Apr27
Using Limit Golden Samples to Manage Non-Quantifiable Quality Standards

post on April 27, 2026

With today’s advanced imaging, it’s recommended to document hard-to-quantify quality criteria with photos and include them in the spec. This reduces the need for limit samples, which are difficult to preserve.

In business transactions, both buyers and sellers usually agree on a product specification and acceptance criteria for the items being purchased. These criteria may include things like full functionality, dimensions within tolerance, intact packaging, and no defects in color or appearance. However, some acceptance criteria are hard—or even impossible—to quantify. Examples include sink marks on plastic parts, gloss or color tone after painting, or appearance issues that are judged mainly by visual feel. So how should these be defined?

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Process, Quality     WorkingBear    Views (454)     comment (0)

Apr22
How to Define Cosmetic Quality Standards for Plastic Parts

post on April 22, 2026
How to Define Cosmetic Quality Standards for Plastic Parts
Caption: Cosmetic scratches on plastic parts

Before products are put into inventory after final assembly, electronics manufacturing factories always perform quality inspections to ensure product quality. In terms of functional performance, most products go through 100% function testing, so pass/fail decisions are usually very clear—unless there are intermittent functional issues. In those cases, it’s still relatively easy to identify good versus bad units. Cosmetic (appearance) judgments, however, are a very different story. Disputes happen all the time. How does your company deal with these situations?

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Plastic, Process, Quality     WorkingBear    Views (426)     comment (0)
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Apr15
Common Ways to Connect FPC to PCB: What Actually Works

post on April 15, 2026

Common Ways to Connect FPC to PCB: What Actually Works

As electronics keep getting smaller and more advanced, the need to connect flexible printed circuits (FPCs) to rigid PCBs continues to grow. In this article, Workingbear will walk you through the most common methods used in the industry today—and share some practical insights from real-world experience.

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Design, PCB/FPC/PTF, Soldering     WorkingBear    Views (718)     comment (0)