What is the difference in duties between each of the (QA,QC,QS)Engineer?

QA, quanlity assuring engineer assuring the process or set of processes to measure the quality product .

QC,quanlity control engineer to as ensure product to meet the costumer expectation.

QS,quantity serveyor engineer to manage and estimate coasts project and planing strategy procedure and value the professional duties engineer.

QA Engineer = Quality Assurance engineer

QC Engineer = Quality control engineer

 Qs Engineer =  quantity survey engineer

Quality assurance (QA)/quality control (QC) engineers are responsible for ensuring the quality of products and services produced by their company. They oversee the manufacturing of products and they are involved in every stage of making a product--from development and manufacturing to packaging.

A quantity surveyor (QS) is a professional working within the construction industry concerned ... Cost planning and commercial management

Quality assurance will establish how the quality of a product shall be achieved, when and who will do it. mean time the quality control will implement and perform the quality measures established. In simple words QA will provide the system to be applied to obtain the required quality and the QC will implement that system.

QA/QC a person ensuring the works translated to site from given specifications and methodology are met. QS a person responsible that the claim/ billing as per payment terms are in order/ accurate prior to approval.

QA Engineer is assuring for quality

QC Engineer is control for quality

QS Engineer is collecting product

QA: Ensures that the products meets the expectations of the and quality with respect to Technologies and other standards of QualitiesQC: Measure the quality and validate it with respect to customer/end user expectation.QS: These engineers surveys, analyse, research and prepare feasibility and cost of the project.

 QA :  quality assurance includes all those parameters and guidelines , as like documents of codes and specifications etc to ensure the projects meets its planned and targeted quality

QA is administration tool to find out the role to assure the quality

QC is a process tool to (tests ) to control the material and process

QS measuring the quantity according the contract  

QA/QC ENGINEER he responsible for all quality in the project 

QS ENGINEER : He responsible for the quantity in the project

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