[Weekly Topic] Things related to quality inspection sampling
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Inspired by a post titled “Who took the samples” posted by a fellow sea lover a few days ago, I’m bringing this up again today; I hope everyone will actively participate in the discussion. Thank you! Let’s talk about the quality control department first. Different companies have varying definitions for the functions of this department; in some companies, the quality control department serves purely as a support unit for production, providing data on product quality for purposes related to production, procurement, and sales. Some companies regard the quality inspection department as a management function, granting it not only the responsibility for providing data but also the authority to evaluate the product quality of the equipment operation teams, as well as to impose rewards and penalties. I went to the quality control department just to find out information in order to post this. It’s true that different fields can seem like entirely separate worlds; the ladies in the quality control department also have a tough job. It seems there’s never enough staff, and much of their time is spent on sampling – climbing up tall tanks dozens of meters high, tasting various materials, with their analysis results often being questioned. Among the team responsible for operating the equipment, there are many skilled professionals who have an almost obsessive confidence in their own abilities. Take some diesel from the mineral water bottle, do a quick test, and mention the color code and freezing point casually; once the analysis results come in, they turn out to be pretty much the same. Whether you’re a sister working in quality inspection or a brother on the operation team, come and discuss matters related to product quality. Whether it’s complaining about difficulties or sharing some achievements, as long as the wording isn’t too harsh, we welcome it. 1. Specifically regarding the operation of \"sampling\", who should be responsible for it – the quality control team or the operating crew? 2. For the analysis of intermediate products, is it better to have a fixed frequency and specific time points, or a fixed number of analyses with random sampling? 3. Have you encountered situations where the shift working on the analysis results raised doubts?
Sampling involves safe procedures; is it necessary to inform the operators about sampling, and should sampling be carried out under their supervision?
Sampling involves safe procedures; is it necessary to inform the operators about sampling, and should sampling be carried out under their supervision?
I’ve never encountered that – the department with a dominant leader tends to do less work.
I just realized that \"the ladies in the quality control department actually have a tough job too.\" So the original poster has started to show tenderness towards the beautiful?
It turns out that one can’t feel sympathy for those they don’t know; now it seems that things are difficult for everyone
This is normal; generally, people think of themselves as the busiest while considering others to be idle.
1. Is it better to use fixed quality inspection products or have lab technicians take samples, as this facilitates supervision and control of the operators?； However, for analysis purposes, it is better for the operator to obtain the temporary samples used for operation adjustment and judgment, as the goal is after all analysis for operational use ； 2. Whether it is the final product or intermediate products, they are all meant to serve production; there should be no adherence to old rules or fixed patterns. My suggestion is a combination of fixed and random approaches: normal production at a fixed frequency, and during abnormal conditions, at a fixed frequency plus testing when necessary ； 3. It is normal for the shift on duty to raise doubts about the analysis results. This is because of testing errors, human mistakes, and issues with sample collection. Additionally, in the middle shift and night shift, there is also a fair amount of copying behavior in the laboratory.
When our equipment was of smaller scale, we required the laboratory technicians to take samples by themselves, but in order to please the laboratory, we would usually take the samples for them, hoping that they would be lenient when the analysis results were on the borderline. Now that the equipment is larger, it’s not clear who is responsible for taking samples, but in most cases it’s the operators themselves who do it. I believe there are several factors behind this. 1. The authenticity of the sample: When the sample results show large fluctuations, the authenticity of the sample may be questioned; even if it’s collected by people within the same group, doubts arise, let alone when it’s collected by others. Sometimes, failing to replace the sample before sampling can indeed affect its authenticity. 2. Safe sampling procedures: It is safer for operators to collect samples from areas with high temperatures. For example, in the case of catalytic slurry, many experienced employees who have been working there for years have suffered burns from the hot slurry. How can safety be ensured if a laboratory technician is tasked with collecting such samples? 3. Regarding the use of sampling equipment, there are also some items that need to be collected by the laboratory technician themselves; for example, liquefied gas samples are taken using the cylinders brought by the technician.
Our factory requires that sampling be carried out through testing; the workers on the operating post must be present to supervise, confirm the process, and assist in operating the sampling valves for hazardous materials
Every task, when done carefully, is not easy