Priciples of Software Engineering Essay Example for Free

Priciples of Software Engineering Essay Describe each law in your own words. Illustrate with a practical example ? Glass’ law â€Å"Requirement deficiencies are the prime source of project failures Coming to my explanation Glass law states that if the basic requirements of the projects is not constructed properly that may leads failure of the project. To achieve goals in the project it plays an vital role and any drawbacks may leads project unsuccessful. Around 20% of all IT project failures were caused by incomplete or badly managed requirements. Example: Technological University-Online Practical Tests In the case of technological university the requirements specifications for the online practical exams had been implemented without consulting students and university staff. This system was designed in such a way that students affliated to that university are write the test test online at the same day and same time. Considering the requirements of the colleges were different an the project objectives were different. This leads to failure of the that project. Boehm’s first law â€Å"Errors are most frequent during the requirements and design activities and are the more expensive the later they are removed†. Coming to my explanation Boehm’s law states that the basic designing of the projects mat leads to errors and miscalculations. The sooner you find a problem, the cheaper it is to fix , otherwise to detect the errors in the project is very expensive or complicated . This law is applicable from midrange systems. Example: City Council – Pay Roll System A city council developed a replacement payroll system believed that users had comprehensive knowledge of all the business requirements. But the current staff or IT team had participated in building the old system they had no knowledge of how it was built. That leads to many errors and it cause project failure. Boehm’s second law â€Å"Prototyping (significantly) reduces requirement and design errors, especially for user interfaces†. Coming to my explanation Boehm’s second law states that by prototype modelling the disigning of the project and errors can be reduced. To design the system the staff will be educated . So that that will increase the usability of the system among users. Example: In a postgraduation course prototype modelling experiments were conducted . Some of them were used requirement driven approach and others are prototyping approach. This will leads to satisfaction for the client compare to all other methods. Davis’ law â€Å"The value of a model depends on the view taken, but none is best for all purposes†. Coming to my explanation Davi’s law states that to describe systems requirements, it is very useful. This model is useful to solve the complicated tasks that other models find that difficult to solve. Example:In a system to solve the problems different methods were implemented. Each task follows their methodolgies to solve the problems. At the end all the methods got different results but there methodologies is useful to solve the problem. Your first task is to describe each software development methodology clearly and completely in your own words. You may use diagrams, examples or UML to help you do this. Waterfall Model : The waterfall model is a sequential software development process, in which progress is seen as flowing steadily downwards through the phases of conception, design, analysis, initiation ,testing and maintenance. This model is used in manufacturing industries and construction industries . It is ; highly structured physical environments in which after-the-fact changes are prohibitively costly, if not impossible. Since no formal software development methodologies existed at the time, this hardware-oriented model was simply adapted for software development. For example, one first completes requirements specification, which after sign-off are considered set in stone. When the requirements are fully completed, one proceeds to design. Spiral Model: The spiral model is a software development process combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts. Each phase starts with a design goal and ends with the client reviewing the progress . Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project. The spiral model might mean that you have a rough-cut of user elements as an operable application, add features in phases, and, at some point, add the final graphics. The Spiral model is used most often in large projects and needs constant review to stay on target. It can get their hands in and start working on a project earlier. Q3) Using the first four laws of the text, show where these are either implemented or missing in each software development methodology (Total Two). If a law is missing, explain the consequences and suggest how the process might be improved. Water Fall Model Glass’ law Requirement deficiencies are the prime source of project failures. The end users gathered by requirements in waterfall model. It states that the basic requirements of the projects is not constructed properly that may leads failure of the project. The failures were caused by incomplete or badly managed requirements. Boehm’s first law â€Å"Errors are most frequent during the requirements and design activities and are the more expensive the later they are removed†. It basic designing of the projects mat leads to errors and miscalculations. In waterfall model this law cannot be able to correct the errors. This law is not reliable for waterfall model. Boehm’s second law Prototyping (significantly) reduces requirement and design errors, especially for user interfaces†. This law cannot be able to correct the errors in waterfall model. The design phase would be reduced by prototype modelling. Davis’ law â€Å"The value of a model depends on the view taken, but none is best for all purposes†. The purpose of this model is not suitable for this law. Spiral Model Glass’ law â€Å"Requirement deficiencies are the prime source of project failures In waterfall model risk analysis is conducted on the prototype. By this if they need any requirement it will included in next stage. Boehm’s first law â€Å"Errors are most frequent during the requirements and design activities and are the more expensive the later they are removed†. In spiral model each phase starts with a design goal and ends with the client reviewing the progress . The risks were eliminated after number of stages. Boehm’s second law â€Å"Prototyping (significantly) reduces requirement and design errors, especially for user interfaces†. In spiral model it will design the prototype. and construct and design the prototype. The analysis and engineering efforts are applied at each phase of the project.

Essay --

What is a fable? A fable is a short story in which characters within the book are played by animals. All fables carry a moral of some kind. Animal Farm, a novel by George Orwell, is a fable in the sense that it incorporates characteristics of a fable, such as giving animals, human qualities and the inclusion of several morals is accounted for as well. Although Animal Farm’s morals are not merely stated, it bears a significant deal regarding the concept of the story. The main morals are all tied together by some form of power. Power is the driving force behind the animal society, once abused, an indication of collapse will be evident. Through the pigs’ abuse of language to strengthen their dominance on the farm, Orwell conveys the power of manipulation in language. For example, Squealer takes the sheep away to teach them a new chant, â€Å"Four legs good two legs better†. The continuous incantation planted in the animal’s mind signified the start of a change. In many ways, they are governed by the pigs more than before, their ideas suggested and their minds are molded. The distortion of the meaning of language ultimately brainwashed them into forming ideas that compliment what the pigs want them to think. Another incident of the pig’s manipulation occurs after the rumor about the pigs taking the apples and milk for themselves. Squealer claimed that the pigs were doing so for the sake of the animals, he also stated that â€Å"milk and apples†¦ contain substances absolutely necessary to the well-being of a pig† and â€Å"Jones would come back!† if they â€Å"failed in [their] duty† (42). This form of propaganda/ threat works in the favor of the pigs because the majority would rather comply and accept the current conditions than have Jones back. The pig... ...al gains. They were never honest with their words or actions until they settle into the temptation of power completely. And once they do, corruption will be seen a lot more often. Power is the force that upholds the structure of Animal Farm and when leaders indulge themselves in excessive power, the structure will be ruined, allowing these leaders with absolute force. Animal Farm is an allegory of the Russian Revolution and a cautionary tale warning readers of the pitfalls of revolution. Although, it doesn’t only concern the Russians, it applies to any form of totalitarian government because of the universal structure of power. It all works the same way, power is obtained, greed for power encourages manipulation and intimidation and a totalitarian is formed. In that sense, any hopes of creating a utopian society based on the equality of all animals is eradicated.

The Difference between Person Centred and Psychodynamic therapy

‘Person-centred and psychodynamic counsellors have a lot to offer each others†¦.. however when the differences between the approaches are examined there are significant areas of contradiction and incompatibility' Wheeler and McLeod (1995) briefly compare the key principles of Person Centred and Psychodynamic approach and critically evaluate where the approaches part company with one another Person centred and psychodynamic counsellors, both have one main aim -to help people develop in a positive way and to move forwards , however the methods they use to reach this goal varies . I will give a brief description of both of the key concepts and compare them ,then evaluate how these differences make the two approaches separate . The Psychodynamic Approach focuses on our mind soul and spirit and how our past can influence these aspects especially our childhood experiences and unresolved childhood conflicts can lead to anxiety and problems when older. Psychodynamic is very much about looking into our unconscious it also delves into how people deceive themselves as to our intentions desires and beliefs and how these deceptions can cause conflict between our expressed goals and our actions. Important aspects of Freudian theory has been the idea that these traumatic experiences are actively repressed and therefore clients are likely to repeat patterns of behaviours . he key concepts address psychosexual stages that occur in the childhood stages of development , the id, ego, super ego and ego defences mechanisms, Freud believed all of these unconscious thought processes lead to a persons present behaviour. Psychodynamic counsellors goal is to make the client aware of there unconscious and dive into there early childhood conflicts . Interpreting transference is often used to link these past conflicts to the present problems, dream analysis may be used to achieve this, free association and possibly transference is used to unlock past co nflicts The Person Centred Approach is more directed as looking at a person as a whole and looks at people with a positive approach and believes with the right given conditions everyone should be able to grow and reach there full potential and even though the past is taken into consideration it is not the main theme like psychodynamic , the main matter now is the present and the relationship between the client and the counsellor and counselling skills are vital in order to make the client feel like they can express themselves Dave Mearns acknowledged the important skills as being congruence ,empathy and unconditional positive regard. The key concepts involves looking a persons present and helping them move onwards to do this counsellors must look at aspects such as the actualising tendency(growth and development) and the six therapeutic conditions (the conditions needed to embrace change). The aims of a person centred counsellor is to provide the right environment for a client and offer a place where the client can feel free to explore themselves and the aspects of change that need to occur a counsellor must have certain qualities to encourage these changes, they must be genuine and have UPR and often try to achieve change by probing and formal analysis this involved a lot of questions and can be time consuming, especially if a client does not want to open up. We can see where these approaches part with each other, the two approaches both have different models of looking at personality and have different therapeutic aims and different techniques to reach these aims. Whereas the person centred approach focus's on experiencing and expressing feelings the psychodynamic approach aims to look at the underlying anxiety behind these feelings and the unconscious thought behind them. n a person centred approach this may result in congruence (directly addressing a situation ) which entails genuineness and personal disclosure in order for the client to feel self aware and would help with self acceptance and possible help the client with some aspects of there questions . owever counter-transference would be used in psychodynamic counselling ( expressing ones own unconscious feelings onto the therapist) and use this as psychodynamic counsellors believe a client may be using defence mechanisms, therefore must look into their unconscious and may not alwa ys answer questions . this may lead to different reactions in the client a client may feel that the psychodynamic approach of counter transference my be distant as psychodynamic counsellors try to be more professional however in person centred the client may feel more invited to open up . Another clear difference in the two is the way that gender is addressed , psychodynamic counsellors see men and women as psychologically different due the theory of the Oedipus complex yet person centred does not emphasised gender ,therefore psychodynamic approach has been criticised for being phallo-centric . The same applies when cultural differences is looked at however this time it is the psychodynamic approach that does not address culture but the person centred approach that adapts its skills to suite peoples backgrounds . When I look at these two approaches its clear that they separate because overall psychodynamic counselling is about detailed elaboration and looks towards the past and what did exist and what conflicts have not been resolved and believes that people are very self destructive ,all in all psychodynamic approach is a very un positive look on people as a whole and it is often criticized for putting to much emphasis on the past and the stages of development Freud often gets criticized for being old fashioned in comparison to the person centred approach however psychodynamic counselling did offer a lot of new ideas into counselling and still remains very influential. In conclusion I think that there are benefits to both of the counselling approaches and combined persons centred and psychodynamic approaches and together would be a good way to approach counselling however this is debated over widely and not always considered plausible but I think it depends on the therapists individual skills and the model of therapy they use with a client . overall I think that both approaches aim to help the client excel but have very different ways of approaching this and in terms of focusing on a individuals recovery and their overall well being I believe the person centred approach succeeds.

Marks Spencers Marketing Strategy - 1365 Words

Background: Marks Spencer was originally founded as Penny Bazaar in 1884; the company successfully developed itself into a retail chain store in the 1990s. It specializes on food, fashion and home furniture. Marks Spencer has become an international, multi-channel retailer with high profitability, all originating from a single market stall in the UK. (Marks Spencer, 2014) Over the decades, Mark Spencer has expanded rapidly and grew rapidly throughout the world. There are more than 85,800 employees working for MS in around 800 stores in the UK; in addition, MS has also 455 stores in 54 nations worldwide. (Marks Spencer, 2014) All the goods sold by MS are either designed by MS headquarter or co-designed with manufactures to ensure product quality and reliability. Cost-effective prices, good quality products are both characteristics that encompass the MS brand. Meanwhile, MS has also showed to have a very strong sense of social responsibility; in recent years MS has been concerned with the glo bal ecological environment and the implementation of eco-friendly operations. (Sustainable Review, 2013) It is not only establishing a good image for itself, but MS is also gaining the trust of customers. Moreover, Marks Spencer has crafted cross-store market strategies effectively, which make the firm footing and seeking development in the fierce market competition. (Marks Spencer, 2014) Although Marks Spencer has achieved great success, one of the main driversShow MoreRelatedBtec Business P4- Strategic Planning1220 Words   |  5 Pageswith an organisations corporate values and aims. The intelligent organisation today takes these issues seriously and seeks to design careful, flexible, comprehensive strategies to guide their decisions. Organisations such as The Coca-Cola Company therefore have established strategies for corporate citizenship. 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