Software Quality Control In-Depth

What is software quality control? SQC is a set of activities for ensuring the quality of software products. In addition to this, it aims to ensure that the products meet specifications and requirements.

Understanding Software Quality Control

Software Quality Control (SQC) ensures the task of achieving and also of maintaining the quality of a software product. Hence, it may be seen as a set of activities that are performed. Thus, to achieve quality from each different perspective in a software product. Furthermore, these activities may consist of the tracing and identifying errors. In other words, SQC consists of different testing activities along with some other activities. Hence, to control and achieve the desired level of quality in a product.

The PDCA: An SQC Strategy

Generally, SQC follows a defined strategy, called the PDCA cycle

  • Plan: This involves the definition of objectives and planning of carrying out different quality control activities.
  • Do: It is related to the implementation and execution of the plans.
  • Check: Study and analyze the results generated and comparing it with the expected result to check the deviations (if any) in the results.
  • Act: At this stage, corrections are carried out and applied, if needed, to meet the objectives defined during the planning phase. 

SQC Testing Techniques

Functional Testing

Functional testing is a type of software testing whereby the system is tested against the technical requirements and specifications. It ensures that the conditions are adequately satisfied by the application.

System Testing

The purpose of this test is to evaluate the system’s compliance with the specified requirements. System testing is the process of testing an integrated system to verify that it meets specified requirements.

Usability Testing

Usability testing is a type of testing to determine the extent to which the software product is understood. Furthermore,  which is easy to learn, easy to operate, and attractive to the users under specified conditions.

Unit Testing

Unit testing is a level of software testing to validate that each unit of the software performs as designed. A unit is the smallest testable part of any software. It usually has one or a few inputs and often a single output.

Stress Testing

Stress testing is a type of software testing that verifies the stability and reliability of the system. This test mainly measures the system on its robustness and error handling capabilities under severe load conditions.

Integration Testing

Integration testing is a level of software testing. The purpose of this level of testing is to expose faults in the interaction between integrated units. Integration testing use test drivers and test stubs.

Acceptance Testing

Acceptance testing is a level of software testing to evaluate the system’s compliance with the business requirements and assess whether it is acceptable for delivery.

Performance Testing

Performance testing checks the speed, response time, reliability, resource usage, scalability of a software program under their expected workload. The purpose of Performance Testing is not to find functional defects but to eliminate performance bottlenecks in the software or device.

Winding Up

Some people assume that QC means just testing and also failing to consider reviews. However, for software companies, failure does not always have such broad implications. Still, it can mean carelessly shipping a product that creates catastrophic problems for your customers and destroys their trust in you. And of course, it is very hard for your development team to fix.


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