Chapter 01

Fundamentals Of Software Quality Controlling

why does quality play an important role?

• 1986 Challenger Space Shuttle explosion

• 2010 BP Deepwater Horizon explosion and oil spill

• 2016 Samsung Galaxy Note 7 – Battery defects

Quality is important because it ensures that products, services, and processes meet or exceed customer expectations and requirements. High quality can lead to customer satisfaction and loyalty, improved reputation, and competitiveness in the market. It also helps to reduce costs by minimizing errors and defects.

what is software quality assuarnce?

Software Quality Assurance (SQA) is a way to make sure that the software being created is of good quality and works as intended. It's a process of checking and testing the software to make sure it meets certain standards and requirements before it's released to the public. SQA can include activities like reviewing code, testing and making sure the software meets the customer's needs. The main goal of SQA is to identify and fix problems early on in the development process, so the final product is reliable and meets the customer's expectations.

what are the characteristics tested by software QA processes.

Software Quality Assurance (QA) processes test various characteristics of software to ensure that it meets certain standards and requirements. These characteristics include:

• Functionality: Does the software perform the tasks it is supposed to do?

• Usability: Is the software easy to use and understand?

• Reliability: Is the software stable and dependable? Does it work consistently over time?

• Performance: Does the software run efficiently and quickly enough?

• Security: Is the software protected against unauthorized access and data breaches?

• Compatibility: Does the software work well with other systems and platforms?

• Maintainability: Is the software easy to update and fix if necessary?

By testing these characteristics, software QA processes help to ensure that the final product is reliable, efficient, user-friendly and secure.

how ‘quality’ important in software? .explain in simple term.

Quality is important in software because it ensures that the software performs well, is easy to use and understand, and is reliable and secure. High-quality software is more likely to meet the needs of users and customers, and it will be more likely to be adopted and used effectively.

Quality software can save time and money by reducing the need for repairs, updates, and customer support. It can also prevent data breaches, security vulnerabilities and other issues that could harm the company's reputation.

Additionally, Quality software is often more efficient and user-friendly, which can lead to increased productivity and satisfaction for end users.

In simple terms, quality software is more likely to meet user's expectations, work well, and be adopted and used effectively, which can lead to increased productivity and satisfaction for end users, and also save time and money for the company.

why do faults occur in software?

Faults, also known as bugs, can occur in software due to a variety of reasons. Some of the common reasons include:

• Coding errors: mistakes made by the software developer while writing the code.

• Requirements misunderstandings: when the developer does not fully understand what the software is supposed to do.

• Changes or updates: introducing new features or modifying existing ones, can cause unexpected issues to appear.

• Complexity: software systems can be complex and hard to understand, making it difficult to predict how changes will affect the system.

• Human error: mistakes made by developers, testers, or other team members can also introduce faults in software.

In simple terms, faults occur in software because of mistakes made by developers, misunderstandings of what the software should do, changes or updates to the software, complexity of the software and human errors.

quality control vs testing ?

Quality Control (QC) and Testing are both related to ensuring the quality of software, but they have different focuses and objectives.

Quality Control (QC) is a process that checks the software to ensure that it meets certain standards and requirements. It's a proactive approach to identifying and fixing problems before the software is released to the public.

Testing, on the other hand, is a process of evaluating the software's performance against the requirements and specifications. It's a reactive approach that confirms that the software works as intended, and helps to identify and fix any defects or bugs.

In simple terms, Quality Control is a process that checks the software before it's released to make sure it meets certain standards, while testing is a process that evaluates the software's performance after it's been developed to make sure it works as intended.

how much testing is required?

The amount of testing required for a software project depends on several factors, such as the size and complexity of the project, the risks involved, and the level of quality desired.

Testing should be done thoroughly enough to ensure that the software meets its requirements and works as intended, but not so much that it becomes unnecessarily time-consuming and costly.

In simple terms, the amount of testing required for a software project should be enough to make sure that the software works as intended and meets the requirements, but not so much that it becomes too expensive or time-consuming.

It's important to have a balance between the time and cost of testing and the level of quality desired, it's important to have a testing strategy in place that considers the factors mentioned earlier and others, such as the testing environment, test coverage, test cases and test data.

quality control vs quality assurance?

Quality Control (QC) and Quality Assurance (QA) are both related to ensuring the quality of a product or service, but they have different focuses and objectives.

Quality Control (QC) is a process that checks the product or service to ensure that it meets certain standards and requirements. It is a reactive approach that focuses on identifying and fixing defects or nonconformities after the product or service has been produced.

Quality Assurance (QA) is a proactive process that aims to prevent defects or nonconformities from occurring in the first place. It is a process of monitoring and improving the production processes to ensure that they produce consistent, high-quality products or services.

In simple terms, Quality Control is a process that checks the product or service after it's been produced to make sure it meets certain standards, while Quality Assurance is a process that helps to prevent defects or nonconformities from occurring in the first place by monitoring and improving the production processes.