OM 456 Lecture 5 Fundamentals of SOFTWARE QUALITY

Software Quality Assurance includes the following activities:

-Process definition and implementation -Auditing -Training

Software Quality Control Testing

Unit Testing Integration Testing System Testing Acceptance Testing

Software Quality Assurance (SQA) is

a set of activities for ensuring quality in software engineering processes (that ultimately result in quality in software products).

Software Quality Control (SQC) is

a set of activities for ensuring quality in software products.

Requirements:

business/product/software requirements

Explicit:

clearly defined and documented

Software quality is the

degree of conformance to explicit or implicit requirements and expectations.

Expectations:

mainly end-user expectations

Implicit:

not clearly defined and documented but indirectly suggested

Software Quality Assurance encompasses

the entire software development life cycle and the goal is to ensure that the development and/or maintenance processes are continuously improved to produce products that meet specifications/requirements

The quality management system under which the software system is created is normally based on one or more of the following models/standards:

• CMMI • Six Sigma • ISO 9000

Software Quality Assurance Processes could be:

•Software Development Methodology •Project Management •Configuration Management •Requirements Development/Management •Estimation •Software Design •Testing •Other processes

What is software quality?

As with any definition, the definition of 'software quality' is also varied and debatable. Some even say that 'quality' cannot be defined and some say that it can be defined but only in a particular context. Some even state confidently that 'quality is lack of bugs'. Whatever the definition, it is true that quality is something we all aspire to.

Once the processes have been defined and implemented, Quality Assurance has the following responsibilities:

•identify weaknesses in the processes •correct those weaknesses to continually improve the process

Definition of software quality by ISTQB

The totality of functionality and features of a software product that bear on its ability to satisfy stated or implied needs.

Software Quality Control Reviews

Requirement Review Design Review Code Review Deployment Plan Review Test Plan Review Test Cases Review

Software Quality Control includes the following activities:

Reviews Testing

Definition of quality by ISTQB

The degree to which a component, system or process meets specified requirements and/or user/customer needs and expectations.

Definition of software quality by IEEE

The degree to which a system, component, or process meets specified requirements. The degree to which a system, component, or process meets customer or user needs or expectations.