In this video, we are going to learn about inspection and quality control in manufacturing.

In a manufacturing plant, inspection and quality control are the most important process in order to make a high-quality product.

Inspection and quality control ensures the standard quality by checking the product during manufacturing at different stages.

If the product is not able to meet the desired quality, the product will reject and there will no further process on that unit.

It saves unnecessary processing costs on rejected parts.

So, what is inspection?

After manufacturing, the product is required to perform certain functions.

The process of checking whether the product does so or not is called inspection.

Inspection compares the qualities of the product with a standard product during manufacturing.

In other words, inspection is a process of checking the acceptability of a manufactured product.

What are the objectives of inspection?

Inspection separates defective components from the non-defective components so that adequate quality can be maintained.

Inspection locates defects in process or raw material which otherwise causes problems at the final stage.

It prevents further working on spoiled semi-finished products.

It helps the product to be more economical.

Inspection detects the weak position and trouble in the weak position by checking the design.

Types of Inspection Methods 1.

Revolving Process, Patrolling or Floor Inspection 2.

Fixed Inspection 3.

Key Point Inspection 4.

Final Inspection 1.

Revolving Inspection In this type of inspection, the inspector walks around the workplace floor and checks machine to machine, samples of the work of various workers and machines.

The revolving inspection helps to find errors during the process and before the final product is ready.

It is more effective and not need to move the product to another department for checking. 2.

Fixed Inspection Fixed inspection finds defects after the job has been completed.

Fixed inspection is used when inspection equipment and tools cannot be brought on the workplace.

In this case, workers brought the sample to a centralized position of the workplace, at the interval to check the quality.

Advantages of fixed inspection are the number of inspectors needed is less, and workers and inspectors do not come in contact with each other, thus it eliminates the chance of approving the doubtful products. 3.

Key Point Inspection A key point is a stage of production beyond which, it requires an expensive operation, or it may not rework.

Every product has a key point in its process of manufacturing.

Inspection at key point separates faulty products, and reject them from going to further processing.

Thus avoid unnecessary further expenditure on those poor and substandard products.

It reduces the cost of production. 4.

Final Inspection In the final inspection, the inspector checks the performance, and appearance of the product before delivery.

These types of checking include destructive and non-destructive testing such as tensile testing, impact testing, fatigue testing, etc.

The final stage of inspection ensures that the product should pass the X-ray radiography, ultrasonic inspection, etc. 5. Let's move to quality control.

What is quality control?

Quality control in manufacturing is a process through which, a production system ensures that standard product quality is maintained or improved according to customer's needs.

In other words, it incorporates the testing of units, and determines if the product is within the specification for the final production.

The role of testing is to determine there is any need for correction in the process, so that product can meet the customer's desire.

Importance of Quality Control If I explain quality and control separately, quality is a relative term, and it is explained by comparing it with a standard product.

For example, gear used in sugarcane juice extracting machine isn't as correct, finished as gear used in an engine transmission system.

So, a component is said to be good quality if the component works well for which it is meant.

On the other hand, control is a system for determining, what to inspect, how to inspect, and how often to inspect.

It also finds out the causes for producing a poor product, and suggests the corrective action.

An important aspect of quality control is the establishment of well-defined controls.

Limiting the chances of error, and reduce the manufacturing cost will generate more profit.

Basic Fundamentals of Statistical Quality Control It called Statistical Quality Control if statistical techniques are applied to control the quality or to solve quality control problems.

Statistical Quality Control makes inspection less costly and more reliable than other techniques.

It controls the quality of outgoing products to conclude whether the quality of each product is as per laid quality standard or not.

The SQC technique collects, analyzes the data, and permits more fundamental control over the product quality.

It scientifically fixes the process tolerance.

If we summarize the whole lecture into one line, inspection is important to maintain a certain quality during the manufacturing of a product.

And, quality control is a process by which customer ensures receive product free from defects.

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