Coupling & Cohesion Student – w16006135 Explain in around 600 words, citing any literature you have consulted, what is meant by these terms in relation of object-oriented software design, and explain how they relate to the design you developed in your group. Coupling & Cohesion Conceptualized by Edward Yourdon and Larry Constantine in 1972, coupling and cohesion is a set of concepts to be applied when developing object-oriented systems to simplify the design and help enforce encapsulation. Coupling measures how much one object depends on another object to do its job. Tightly coupled objects will have high number of connections with other objects and a low level of mutual independence, whilst loosely coupled objects will contain the opposite. …show more content…
Highly cohesive objects are a good thing as they are easier to use and maintain, as well as more readable and reusable. To ensure this, objects should contain relevant methods, be clear and concise, and only exist to resolve a specific task. In object-oriented systems there are three types of cohesion: Class, Operation, and Specialization. Operation cohesion is the measure of how much an operation focuses on a single functional requirement, class cohesion is the measure of how much an entire class focuses on a single requirement, and finally specialization cohesion measures how sensible the inheritance between a parent and child object …show more content…
Operation cohesion can be seen throughout, as methods within objects are only included to serve a single purpose. An example of this can be seen in ‘Journal’, which contains the method ‘getVolumeNumber()’. This method has a simple purpose. It returns the volume number of the journal. ‘LoanTransaction’ is an object which demonstrates class cohesion very well. The class only exists to record the details of a user registering a loan, and all its methods and attributes reflect this. Finally, the inheritance between the ‘Item’, ‘Book’, and ‘Journal’ objects make use of specialization cohesion. It seemed far more sensible to separate ‘Item’ into three separate classes, where ‘Book’ and ‘Journal’ would be types of items, as opposed to having one big convoluted class which covered two different entities. In conclusion it is sensible to use coupling and cohesion in tangent, where cohesion is high, and coupling is kept loose. Sticking to this rule allows for object-oriented systems to be designed in a simple and elegant manner. FIGURE
It is really interesting to break down the separate classes and find their similar details and their different details. Obviously the differences are greater in number and some of them fairly extreme. But that is to be expected.
Although most things come best in pairs, the individual components may be just as harmonious.
Coupling capacitor is used to connect one circuit element to another circuit element. Only an AC signal passes through, the DC signals are blocked. This is commonly used in audio devices, like microphones.
In doing so you are building onto those concepts and values creating a stronger sense of understanding of Marine Corps values. Cohesion in simplified terms is a unification of equilibrium between unit members. In the long run, it 's strengthened over time, producing the installment of “individual morale, confidence in the unit’s combat capability, confidence in unit leaders, horizontal cohesion, and vertical cohesion. In combination, these dimensions dramatically affect the capabilities of a unit.” (MCRP 6-11 pg.5-3). There are many versions of cohesion, as this concept plays an important benefactor under the sense of belonging. Cohesion plays a big role in indicating to yourself, where in your unit or how in your unit you fit in “the big picture.” This concept is an essential tool to be included in all aspects of the various levels of
A framework is a set of classes that supports reuse at larger granularity. It defines an object-oriented abstract design for a particular kind of application which enables not only source code reuse, but also design reuse [Johnson & Foote, 1988]. The framework abstract structure can be filled with classes from its own library or application-specific ones, providing flexibility for the developer to adapt its behavior to each application. Besides flexibility, a good framework also increases the team productivity and makes application maintenance easier [Fayad et al. 1999].
Cohesion is defined as the action or fact of forming a united whole. I believe cohesion is one of the most vital elements for group
Cohesive Force: The intermolecular forces that cause liquids to resist separation and to remain a certain shape. This exists between molecules of the same substance.
The team from Nut Island had the potential to accomplish great things. They were a very cohesive team. Cohesiveness relates to the degree to which members are attracted to and motivated to remain part of that team. A cohesive group member values his or her membership and strives to maintain a positive relationship within the group. Every person working at Nut Island wanted to be there and would not let anything get in the way of their team.
Team cohesion is the process of connecting the team. It’s a makes the team stick together and achieve it even when everyone is tired, under pressure or Faces difficulties and challenges. There many aspects to strengthen the strong team association and some are shown in.
distinguishes a tie between people that will provide that interaction as well as keep the interaction consistent on a regular basis.
obect orientated programming has many advantages, one of these is the fact that the objects created : Jeffrey L. Popyack (2012) "can easily be reused in other programs." The Saylor Foundation also states that object orientated programming allows “Improved software-development productivity" and "Improved software maintainability” through the modular structure of the development.
From this example, we can see that the coherence of a system is defined to be inversely related to the number of beliefs in the system and proportional to the number of relations within the system. Formally, Bonjour defines coherence by dividing it into five “coherence criteria” such that:
...to enterprise-wide technology architecture. It embraces all information technology issues in the organization, which encompasses technical, informational, application and infrastructural architecture. This is the reason why the company had adopted common object request broker architecture (CORBA) to integrate different languages in an intermediary (Porter, 1985).
Lexical cohesion is achieved by the selection of words that are semantically related in the term of meaning.
A special bond is shared and a sense of comfort and togetherness is felt in most any situation. This attachment is very normal in close relationships and healthy to a certain extent. Many times one person becomes more dependent on the other and this can be very unhealthy because everyone needs their own sense of identity. Without your own sense of identity, you might feel smothered or unable to function without your mate. Either way, it is a lose-lose situation.