Sunday, July 29, 2018

Quality control | How it is done? | QSQTECH.COM

Quality control 

Quality means fit for use, it means -
  • Degree to which the product satisfy the customer 
  • Totality of functions and features that fulfill the customer's requirements as per specifications
  • Virtue - degree of goodness or value - Excellence
Now, we are talk about Quality control,
What is Quality control? How it is done in an organization?

Definition : The activities focus on identifying defect in the actual products produced. Quality control is a set of activities for ensuring quality in products.
It is the process of inspecting products to ensure that they meet the required quality standard.                                             

According to ISO 9000 -
ISO 9000 defines the quality control as a part of quality management focused on fulfilling quality requirement.

Companies that engage in quality control typically have a team of workers who focus on testing a certain number of products or observing services being done. The products that are examined usually are choosen at randomly. The goal of the team is to identify products that do not meet a company's specified standards of quality.

If a problem is caught or identified, the job of a quality control team and professional might involve stopping production untill the problem has been solved.
After that other individuals are discover the causes of problem and fixing them.
After the problem solving and the problems are overcome and the target of problem solving has been achieved, the products continues under production or implementation as usual.
Many types of companies perform these type of quality checks.

Thank you 😊 so much..

Some of related question that help to improve your basic knowledge.

Defect analysis_and its necessity with simple definition

Defect analysis : 
Defect analysis is a part of contineous quality improvement planning in which defects are classified in different categories and are also used to identify the possible causes in order to prevent the problem from occuring.

Defect analysis के बारे में हिन्दी में पढ़ने के लिए यहाँ click करे।

Necessity : It is nacessary to identify
how issue can be prevented and in reducing or eliminating significant number of defects from being injected into the system .

Defect analysis can be used for measurement of change before and after the introduction of the improvements.
It helps in improving both productivity and quality. It also helps in reducing the effort needed for defect removal on a long-term basis.               

Thank you.

Some of related question that help to improve your basic knowledge.

Root cause analysis | QSQTECH.COM

Root cause analysis image

Root cause analysis : 

Hello friends, 
Today, We'll discuss on Root cause analysis. Hopefully, you'll understand this topic.
First of all, thanks for visiting.
Now, below topics that we are covering today. 

Training on Root Cause Analysis.pdf Click here to download.


Root cause analysis is problem solving tool which is used to get the root of the problem. It has been considered as one of the most important element of problem solving in the quality management system. This is because if we are not aiming at the right target then we will never be able to eliminate the real problem which is harming the quality of a product. 

"It is the fundamental breakdown or failure of a process which, when resolved, prevents from recurrence of a problem.
For a particular product problem, Root cause is the factor that, when you fix it, the problem goes away and not come back." 

 Root cause analysis is a systematic approach to get the true root causes of our process problem. 


  • To prevent problem from recurring. 
  • To reduce possible injury to personal. 
  • To reduce rework and scrap. 
  • Increase competitiveness 
  • Promote happy customer and stack holders. 
  • Ultimately, reduce cost and save money. 


First, For you this is very important to know that,
What is symptom approach?
I am telling you very easy definition to learn and understand.


If we do a poor job of identifying the root causes of our process problem, we will waste time and resources putting band aids on symptom of problem. 
Symptoms and Root cause image

If we do not better root cause analysis and if we will do work on symptom that is the action of band aids,
Band aids means this is used on any cut and cover it.
Such like band aids are used on process problem instead of true root cause analysis.

Symptom approach vs Root cause : 

Some of related question that help to enhance your basic knowledge.

Poka yoke | know about its history | QSQTECH.COM


Thank you for joining us today as we delve into the Poka-Yoke concept. Our aim is to ensure clarity and understanding on this topic.

Here's an overview of what we'll be covering:
  • Introduction
  • Categories of Poka Yoke Devices
  • Traditional Methods for Error Prevention
  • Enhanced Approaches for Error Prevention
  • Historical Background
We appreciate your participation and engagement. Let's get started!

Training on Poka-Yoke.pdf  click here to download.


Poka-yoke devices are strategically implemented within companies to minimise errors, particularly in high-risk areas. These devices serve to make processes foolproof, effectively preventing mistakes and ensuring smooth, safe operations.


Poka-Yoke, also known as mistake-proofing, serves as a safeguard against errors. It's a system designed to prevent mistakes from occurring, but if they do happen, it promptly detects and allows for correction.

Mistake-proofing, or Poka-Yoke, encompasses activities aimed at raising awareness, detection, and prevention of mistakes that could negatively impact:

  • Our customers and consumers, resulting in defects
  • Our employees, potentially leading to injuries

The ultimate goal is to achieve zero defects and injuries, ensuring the highest standards of quality and safety.

Categories of Poka Yoke Devices:-

Poka yoke devices are divided into three categories: 
1. Awareness
2. Detection
3. Prevention

1. Awareness: 

Awareness ensures that everyone from process owners to shop floor associates are aware of potential mistakes. These devices alert the operator about the potential for errors or guide them through the correct process to prevent mistakes. This entails designing processes and products in a manner that facilitates easy detection and prevention of defects.

2. Detection: 

Detection involves acknowledging the possibility of mistakes occurring and installing systems to identify them swiftly, halting them before they impact the customer. These devices identify when an error has occurred, allowing for immediate intervention or correction. While detection Poka yoke devices don't prevent errors outright, they provide timely signals or alarms to alert users, enabling prompt corrective action. For instance, a high-temperature alarm serves as an effective detection mechanism.
High temperature alarm

3. Prevention: 

Prevention means that we will such changes in design so that any mistake cannot be done by mistakenly. Not allowing the chances for the error to occur within the first place.
Prevention is the best other than. Prevention devices are designed in such a way that mistakes are made impossible. 
For example:- Data cable, Pen drive, Sim/Memory card slot

Example image of Poka yoke.

Traditional Methods for Error Prevention: 

  • Reprimand workers 
  • Give motivational talks to worker              (Tell them to pay attention and be more careful) 
  • Retrain workers 

Enhanced Approaches for Error Prevention: 

1. You should remove the opportunity for error 
  • Improve the process 
  • Make wrong action more difficult 

2. You can't remove the opportunity for error, then,
  • Make it easier to discover the error that does occur. 

Historical Background:

Poka yoke invented by Shigeo Shingo. 
Shigeo shingo (1909-1990) was a Japanese industrial engineer who was considered as the world's leading expert on manufacturing practices and the Toyota Production System. In 1945, at the end of second World war, he started to works at the Japan Management association (JMA) in Tokyo and becoming a consultant focused on the improvement of factory management.

Poka yoke means to mistake proof the process.
The essential idea of Poka yoke is to design your process so that mistakes are impossible or at least easily detect or correct. 

First Poka yoke device: 

Shigeo shingo suggested a solution during visiting in a switch manufacturing plant that became the first Poke yoke device. 
When, Shigeo shingo was visiting in a switch manufacturing plant. Then he saw there the workers during the time of a switch assembly, they pickup a spring from spring box, and after that assembled it in switch assembly. But mostly switches such made in which only one spring assembled instead of two springs. It means that one spring was missing by mistakenly. Then Shigeo shingo provide the best solution for this.

He suggested that :-
A small plate is placed in front of the parts box, and the worker's first task is to take two springs out of the box and place them on the plate.
Then the worker assemble the switch, if any spring remains on the plate, then the worker knows that he has forgotten to insert it.
Then  new procedure completely eliminated the problem of the missing spring. 

Thank you.

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