Software maintenance in software engineering is the modification of a software product after . These have since been updated and ISO/IEC presents. This International Standard describes in greater detail management of the Maintenance Process described in ISO/IEC , including Amendments. ISO/IEC/IEEE was prepared by Joint Technical Committee ISO/IEC the harmonization of ISO/IEC and IEEE Std
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Software maintenance in software engineering is the modification of a software product after delivery to correct faults, to improve performance or other attributes. A common perception of maintenance is oso it merely involves fixing defects. Software maintenance and evolution of systems was first addressed by Meir M.
Over a period of twenty years, his research led to the formulation of Lehman’s Laws Lehman Key findings of his research include that maintenance is really evolutionary development and that maintenance decisions are aided by understanding what happens to systems and software over time.
Lehman demonstrated that systems continue to evolve over time.
As they evolve, they grow more complex unless some action such as code refactoring is taken to reduce the complexity. In the late s, a famous oso widely cited survey study by Lientz and Swanson, exposed the very high fraction of life-cycle costs that were 1464 expended on maintenance.
They categorized maintenance activities into four classes:. Many subsequent studies suggest a similar magnitude of the problem. Studies show that contribution of end user is crucial during the new requirement data gathering and analysis. And this is the main cause of any problem during software evolution and maintenance. So software maintenance is important because it consumes a large part of the overall lifecycle costs and also the inability to change software quickly and reliably means that business opportunities are lost.
The 17464 software maintenance issues are both managerial and isi. Key management issues are: Key technical issues are: Software maintenance is a very broad activity that includes error correction, enhancements of capabilities, deletion of obsolete capabilities, and optimization. Because change is inevitable, mechanisms must be developed for evaluation, controlling and making modifications.
So any work done to change the software after it is in operation is considered to be maintenance work. The purpose is to preserve the value of software over the time. The value can be enhanced by expanding the customer base, meeting additional requirements, becoming easier to use, more efficient and employing newer technology. Maintenance may span for 20 years, [ citation needed ] whereas development may be 1—2 years.
An integral part of software is the maintenance one, which requires an accurate maintenance plan to be prepared during the software development.
It should specify how users will ied modifications or report problems. The budget should include resource and cost estimates. A new decision should be addressed for the developing of every new system feature and its quality objectives. The selection of proper enforcement of standards is the challenging task right from early stage isk software engineering which has not got definite importance by the concerned stakeholders. There are a number of processes, activities and practices that are unique to maintainers, for example:.
Software maintenance – Wikipedia
Swanson initially identified three categories of maintenance: Things like compliance with coding standards that includes software maintainability goals. The management of coupling and cohesion of the software. Note also that some academic institutions [ who? Not only are error-prone modules troublesome, but many other factors can degrade performance too. A very common situation which often degrades performance is lack of suitable maintenance tools, such as defect tracking software, change management software, and test library software.
Below describe some of the factors and the range of impact on software maintenance. From Wikipedia, the free jso.
ISO/IEC – Software Engineering — Software Life Cycle Processes — Maintenance
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Best practices for managing your software investment. Assessing Evidence from Change Management Data. Burt Swanson, The dimensions of maintenance. Proceedings of the 2nd international conference on Software engineering, San Francisco,pp — “. Archived from the original PDF on Retrieved 5 November Major fields of computer science.
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