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![ Maintainability. Effort required to locate and fix an error
in a program.
Flexibility. Effort required to modify an operational
program.
Testability. Effort required to test a program to ensure
that it performs its intended function.
Portability. Effort required to transfer the program from
one hardware and/or software system environment to
another.
Reusability. Extent to which a program [or parts of a
program] can be reused in other applications—related to
the packaging and scope of the functions that the
program performs.
Interoperability. Effort required to couple one system to
another.
Product
Revision
Product
Transition](https://image.slidesharecdn.com/se-2-161226080901/75/Characteristics-of-Software-10-2048.jpg)
Uploaded byUpekha Vandebona
Characteristics of Software
The document outlines various characteristics of software engineering, including cost considerations and failure rates for both software and hardware. It details McCall’s classification of software quality attributes such as correctness, reliability, efficiency, and usability, along with maintainability, flexibility, testability, portability, reusability, and interoperability. The document emphasizes the importance of these characteristics in ensuring that software meets user requirements and performs reliably.
In this document
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Introduction to software engineering characteristics by Upekha Vandebona.
Comparison of software cost versus hardware cost and the implications of time and cost.
Examines the failure curve in hardware, focusing on stages like infant mortality and wear-out.
Analyzes software failure rates and the impacts of changes on failure rates in the ideal vs actual curves.
Introduces McCall's classification related to software quality involving product, operation, revision, and transition.
Discusses key quality attributes including correctness, reliability, usability, integrity, and efficiency.
Focuses on maintainability, flexibility, and testability as important qualities in software revision.
Highlights interoperability, reusability, and portability as critical elements in product transitions.
Defines correctness, reliability, efficiency, integrity, and usability in software products.
Describes maintainability, flexibility, testability, portability, reusability, and interoperability in software.
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Characteristics of Software
- 1. Software Engineering CHARACTERISTICS OF SOFTWARE UpekhaVandebona upe.vand@gmail.com
- 2. Software Cost andHardware Cost Hardware Cost Software Cost Time Cost
- 3. Failure Curve forHardware Infant Mortality Wear out Time FailureRate
- 4. Failure Curve forSoftware Time FailureRate Ideal Curve Actual Curve Changes Increase Failure Rates due to Side Effects
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- 9. Correctness. Theextent to which a program satisfies its specification and fulfills the customer’s mission objectives. Reliability. The extent to which a program can be expected to perform its intended function with required precision. Efficiency. The amount of computing resources and code required by a program to perform its function. Integrity. Extent to which access to software or data by unauthorized persons can be controlled. Usability. Effort required to learn, operate, prepare input for, and interpret output of a program. ProductOperation
- 10. Maintainability. Effortrequired to locate and fix an error in a program. Flexibility. Effort required to modify an operational program. Testability. Effort required to test a program to ensure that it performs its intended function. Portability. Effort required to transfer the program from one hardware and/or software system environment to another. Reusability. Extent to which a program [or parts of a program] can be reused in other applications—related to the packaging and scope of the functions that the program performs. Interoperability. Effort required to couple one system to another. Product Revision Product Transition
Editor's Notes
- #7 Correctness, the functionality matches the specification. Reliability, the extent to which the system fails. Efficiency, system resource (including cpu, disk, memory, network) usage. Integrity, protection from unauthorized access. Usability, ease of use.