What is the difference between Quality Assurance and Quality Control while considering the Engineering & Construction Industry?

Quality Assurance is the process of defining how a work will be done  to achieve the desired quality and standard. This is done by defining a set of standards like Method Statements and Inspection and Test Plans.

Quality Control is checking that the work done is as per defined set of standards. This is done by Inspections.

Quality Assurance is:A set of activities for ensuring quality in the process which products are developed A process oriented and focuses on defect prevention Example is verification A managerial tool Everyone on the team involved in developing is responsible Statistical technique used for QA is Statistical Process Control (SPC) A process of managing for quality

 

 

Quality Control is :A set of activities for ensuring the quality in products. The activities focus on identifying defects in the actual products produced A product oriented and focuses on defects identification Example is validation A corrective tool The responsibility of a specific team that tests the products for defects Statistical technique used for QC is  Statistical Quality Control (SQC) Verify the quality of product

 

Quality Assurance is all activities relating to preventive action, while quality control is all activities relating to corrective action

Quality issurance is a process oriented and focuses on defect prevention while quality control is product oriented and focuses on defect identification

Qa is to Implement the reqirment and QC is Montor for Countinual Improvment

Quality assurance mean the processes and procedures and plans that perform to make sure that the final product  will be as designed

 

quality control mean all the ways that use to show if the product accepted or not according to specs 

QA -WE GIVE ASSUR ABOUT DESIRED QUALITY WITH SOME REFERENCE

QC-MAINTAIN QUALITY WITH SOME REFERENCE

QA refer as “prevention”  aims to target the process to used mange and deliver the solution. It may conduct by manager or customer or third party.

QC refer as “inspection” to verify the that deliverables are acceptable quality , to meet completeness and correctness criteria according the Q plan acceptance by the executor and client.

The terms “quality assurance” and “quality control” are often used interchangeably to refer to ways of ensuring the quality of a service or product. The terms, however, have different meanings. Assurance: The act of giving confidence, the state of being certain or the act of making certain. Quality Assurance: The planned and systematic activities implemented in a quality system so that quality requirements for a product or service will be fulfilled. Control: An evaluation to indicate needed corrective responses; the act of guiding a process in which variability is attributable to a constant system of chance causes. Quality Control: The observation techniques and activities used to fulfill requirements for quality.

It can described most briefly as,

 

QA : is to Plan What & How to Control by QC.

QC: is to execute & feedback the results to QA.

 

Its a cycle for continual improvements.

The core of the Quality Assurance is  the PDCA (Plan,Do,Check & Act) Deming wheel with the purpose of a continous improvement this for a continous better client satisfaction

Quality Control is a simple part of the Quality Assurance  which performs within the D (Do) element of the hole PDCA with the aim to inspect & certify the client's product &/or service