Extensibility - Ease of adding new features to an existing codebase. Maintainability - Ease of reading and understanding the existing codebase to easily debug, optimize and refactor it. Reusability - Ease of using previously created code in order to reduce redundancy and repetition in your code.
What is maintainability in software testing?
Maintainability of a software in terms of source code maintenance is considered to be one of the key criteria for acceptance of software delivery. This is also defined as one of the key characteristic of software quality as per ISO/IEC 9126, ISO/IEC 25010 standard specification. What may make a piece of code maintainable?
Is your source code maintainable?
Therefore, it has been proven that it ismaintainable.” This distinction is important. “Maintain-Ability” is literally the ability to maintain. According to its definition in ISO 25010, source code maintainability is not a binary quantity. Instead, maintainability is the degree to which changes can be made efficiently and effectively.
What is the difference between maintainability and maintain ability?
This distinction is important. “Maintain-Ability” is literally the ability to maintain. According to its definition in ISO 25010, source code maintainability is not a binary quantity. Instead, maintainability is the degree to which changes can be made efficiently and effectively.
How can I measure the maintainability of a block of code?
Maintainability of a block of code can be measured using some of the following techniques: 1 Test coverage 2 Code complexity 3 Documentation
What do you mean by maintainability?
Maintainability is the measure of the ability of an item to be retained in or restored to a specified condition when maintenance is performed by personnel having specified skill levels using prescribed procedures and resources at each prescribed level of maintenance and repair.
What is maintainability in programming?
More formally, the IEEE Standard Glossary of Software Engineering Terminology defines maintainability as: "The ease with which a software system or component can be modified to correct faults, improve performance or other attributes, or adapt to a changed environment."
What is maintainability with example?
System maintainability analysis For example, if it is said that a particular component has a 90% maintainability for one hour, this means that there is a 90% probability that the component will be repaired within an hour.
What is maintainability in OOP?
Maintainability, which is the system's ability to retain its original form and to restore back in case of failure, helps the new operator in easy understanding of the system.
Why is maintainability important?
Maintainability is considered, inherent to the building system design, ensuring the ease, accuracy, safety, and economy of maintenance tasks within that system. The purpose of maintainability is to improve effectiveness and efficiency of maintenance.
How do you keep codes maintainable?
13 Ways to Improve MaintainabilityFollow a clean and consistent coding standard. ... Use human readable and sensible names. ... Be clear and concise. ... Minimize complex conditional and nested logic. ... Methods should be small and singularly focused. ... Classes should be focused. ... Decouple and organize. ... Minimize redundancy.More items...•
What is a maintainable code?
Code maintainability is a capability that requires organization-wide coordination, since it relies on being able to search, reuse, and change other teams' code. Managing dependencies effectively is often a major source of pain when working with large codebases and large organizations.
How maintainability is improved?
Improving maintainability can be a complex process that involves a careful analysis and optimization of conflicting factors such as resources, time and competencies, along with desired reliability and availability of equipment.
What is availability and maintainability?
Availability means that something is operational, reliability means it's likely to work correctly, and maintainability implies that, even if something does go wrong, it can be fixed easily.
What are the 6 principles of OOP?
Abstraction, encapsulation, polymorphism, and inheritance are the four main theoretical principles of object-oriented programming. But Java also works with three further OOP concepts: association, aggregation, and composition.
Why is OOP easier to maintain?
OOP provides a clear modular structure for programs which makes it good for defining abstract datatypes where implementation details are hidden and the unit has a clearly defined interface. OOP makes it easy to maintain and modify existing code as new objects can be created with small differences to existing ones.
What is reusability in OOPS?
Reusability: Inheritance supports the concept of “reusability”, i.e. when we want to create a new class and there is already a class that includes some of the code that we want, we can derive our new class from the existing class. By doing this, we are reusing the fields and methods of the existing class.
What is maintainability of an application?
Maintainability represents the degree of effectiveness and efficiency with which a product or system can be modified by the intended maintainers. Maintainability incorporates such concepts as changeability, modularity, understandability, testability, and reusability.
What is maintainability and reliability?
While reliability characterizes how long an asset can operate without issues, maintainability describes the likelihood the same asset can be restored once a failure does occur. Think of maintainability as something you want to have in the event of an unforeseen failure.
What is maintainability software testing?
The term maintainability corresponds to the ability to update or modify the system under test. This is a very important parameter as the system is subjected to changes throughout the software life cycle.
What is maintainability of software?
Maintainability of a software in terms of source code maintenance is considered to be one of the key criteria for acceptance of software delivery. This is also defined as one of the key characteristic of software quality as per ISO/IEC 9126, ISO/IEC 25010 standard specification.
What is changeability in code?
Changeability: The code should be easy to change. This, in turn, may also get related with ease of understandability and learn-ability of code which is key sub-characteristic of Operability /Usability (refer ISO/IEC 25010 standard).
What is the testability of a block of code?
Testability: The block of code should be easy to test. The code testing can be achieved by unit testing frameworks such as JUnit, NUnit etc.
What is the most important aspect of coding?
1. Proper Naming. Naming is on of the most important aspect of coding. But somehow most of developers underestimate the importance of proper naming in the code. Developers spend most of their time reading code instead of writing. Thinking what is the purpose of this class, what kind of data containing in this field and what this method really does.
Who said always code as if the guy who ends up maintaining your code will be a violent psychopath who knows?
Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live — John Woods
How to avoid complex conditionals?
Avoid complex conditionals. Just extract complex logical conditions to a separate method that sounds like Boolean question and return a Boolean value.
What is maintainability in equipment?
Maintainability is one of the key concepts for equipment manufacturers, operators, and asset managers. In its simplest form, maintainability means “ease of doing maintenance”.
What is the focus of maintenance?
The focus is to get the equipment up and running as quickly as possible, with the lowest possible cost incurred on maintenance. The easier it is to perform repairs and maintenance on an asset, the higher its maintainability.
How to store preventive maintenance checklists?
Provide quick access to preventive maintenance checklists, drawings, logs, and procedures. The easiest way to do that is to store them in a CMMS database. Technicians and mechanics can just open their mobile maintenance app and pull up the required resource.
What is reliability in financial terms?
Reliability is the probability of an asset to perform its desired function under predetermined conditions for a set amount of time. Reliability defines the failure frequency and determines the uptime patterns. It is often measured through the mean time between failures (MTBF).
Why is standardization important?
The practice of standardization is commonly employed in the industrial space to minimize the types and sizes of bolts and fasteners within any asset assembly. This has obvious benefits as discussed earlier in the article.
Why should assets, equipment, assemblies, and sub-assemblies be identifiable from each other?
Assets, equipment, assemblies, and sub-assemblies should be identifiable from each other to facilitate communication and record-keeping. Asset operators achieve this by assigning unique and meaningful tags to assets and components.
Why use generic parts instead of custom fit?
Using commonly available generic components rather than custom-fit parts enables the end-user to use alternate spares from the market if original spares are not available or have longer lead times. In essence, it is an easily achievable optimization of maintenance activities.
How to determine maintainability?
Rather, we suggest to determine maintainability by investigating and assessing different quality criteria, such as how the code is structured or how much redundancy is present in the code base. Differentiating between such quality criteria allows you to get a more thorough, actionable, and objective understanding of the underlying problems and to develop an appropriate and targeted improvement strategy.
Why is maintainability important?
The maintainability of your code base plays an important role for the future-proofness of your system. Getting an overview and being able to assess it correctly are important preconditions for steering development and maintenance activities in a meaningful way.
What is quality criteria?
The quality criteria we apply in practice [2] generally estimate, how frequently developers are faced with code that contains specific maintainability problems in their daily work, or—as one customer coined it—the quality of life of the developers. To this end, we measure how prevalent a specific problem is in the code base and apply a threshold for its evaluation.
How to measure maintainability of code base?
In order to measure and assess the maintainability of the relevant areas of your code base, you have to make sure the analysis scope is set accordingly. This includes both setting up your project in a meaningful way for correct measurement, e.g. excluding generated code, as well as looking at the right portion of the code base, e .g. the application code or a specific folder, when examining and assessing the results.
Is maintainability a problem?
A single maintainability problem, such as a single long method or a copied file, does not present a serious issue for a system. But without effective counter measures, the quality of any system will gradually decay. Especially grown code bases often already contain a large number of quality problems. Chances are you already find yourself far from an "ideal" target.
Can quality metrics be weighted?
In general, many quality metrics can be calculated on the level of individual files or classes and turned into a weighted average. Often, however, this raw average value is of little use: Are all the problems in a single file or is the problem rather equally distributed? What should be done concretely to improve the situation? We recommend to always examine the distribution of a metric over the entire system. In Teamscale, you can easily get such an overview with assessment charts or treemaps.
Is it hard to avoid code?
In practice, it is very difficult to completely avoid code with improvable or poor structure, especially in grown code bases. There will always be some structural problems, such as a long method to create UI objects or an algorithm with some deep nesting. But these problems are not a threat to maintainability unless they take the upper hand.
