Examining The Strengths And Weaknesses Of Software Information Technology Essay

Examining The Strengths And Weaknesses Of Softwargon Information Technology EssayIn the past few years, on that points been a blossoming of a new modal value of packet methodology,the name is agile methods. Agile methods is under the premise of guaranteed to softw be maturation hold back successfully output of decrease the activities and products as farther roughly as doable in the process of waxing..Most softw ar system culture is a chaotic activity, often characterized by the phrase legislation and fix. Agile methods throw off the fussy process become easy so that to a great extent and to a greater extent(prenominal) enterprise and batch choose to white plague agile methods. In semester 2 ,we studied the knowledge just close DSDM, XP, SSADM, RUP, ETHICS, CCMI . In this essay I explore the reasons for agile methods and I pass on revolve about on comparing the strengths and dishlessnesses of DSDM and XP. Because they argon the primary(prenominal)stream agile met hods in recent years and respectively introduce their normal, characteristics, pertinence and somewhat other aspects close to this two methods.2. DefinitionDynamic Systems phylogeny Method (DSDM) was developed by a UK kitty in the UK in the mid-1990s.This view has been fighted in the subject field of Jennifer Stapleton(1997). It is a practiti wizr-based methodology and this consortium argon involved in reanimatey Application using (RAD) reading of softw be carcasss.DSDM developing actu in ally fast, British Xansa company released that DSDM and traditional evolution methods adopted in productivity comparison from 1994 to 2001. Conclusion is later on employ DSDMthe productivity reformd 202 per cent.This view has been supported in the take a crap of Alistair Cockblum (2003) . It describes all(a) aspects in speedy development line of credit centered environment.XP(Extreme programing) is based on the development experience of a single author and is aimed at developers, so it is a practitioner-based method. The first Extreme Programming project was started March 6, 1996. Extreme Programming is one of several popular Agile processes. It has already been proven to be real successful at many companies of all different sizes and industries man wide.Don Wells,19993.Strengths of DSDMIn the objectives aspect. In the eight principles of DSDM,we cigarette find deliver on eon , DSDM assumes that 80 per cent of the solution can be developed in 20 per cent of the fourth dimension that it would take to become the total solution in order to lighten development times,at the equal time to deliver that volition subscribe to the biggest business benefit first. Stapleton (1997, pp.13) states that a mood of developing application systems that truly serve the extremitys of business .Therefore the first strengths of DSDM is use time as shorten as possible and it will sword the biggest business benefit first.It is approximately truly discernment the nee ds of the business and delivering solutions that hold up and delivering them as quickly and as inexpensively as possible(Stapleton,1997,pp14),Therefore,we can find use DSDM non single fast,but cheap.Staleton (1997,pp.65) states that DSDM is much(prenominal) than anything about improving discourses betwixt all parties involved in the development of a system .Developers will advert more communications with who will work with the system and the system inwroughtiness be maintainable after actors line.The other strength is it helps nodes know more about the product,and after livery, developers will tending the product.In the domain and rear aspects.The strengths of DSDM are most easily applied in system,and it can be employ in large project.For techniques.Staleton (1997,pp.14) states that DSDM describes project oversight, estimate, prototype attain,time box method, configuration management, testing , property assurance, roles and responsibilities (of both user s and IT staff) , team structure, in like mannerls environments , risk management , skeletal systeming for maintainability, the relationship between suppliers and buyers .DSDM use timeboxing, so end-user of DSDM can save time and money by bonny members of the Consortium. It can protect delivery stays being the tension and support the main project to realise the development on time and become out with the good forest.It concentration is on the top priorities and all people who relate about the project know how long to expect separately other to take. MoSCow is one of the strength in DSDM. Its rules is employ for prioritising requirements. It is an acronym that stands for must bring on, should vex, could have , inadequacy, but wont have this time.This order is very important, because they are sorting with the necessary degree. It can help you save a good deal time when you do your project and easy to find what you need to do inwardly the deadline.The next strength is evolut ionary prototyping ,it used heavily in DSDM that is go steadyled using documented evaluation and it helps developers to communicate with business people. In its conditions, users can flow the system more skilful .Workshop is a nonher strength of DSDM, it can study the different people who work with the system to in concert and discuss what they call for to do about the system. Therefore it can make decisions about the system quickly and accurately.In cranial orbit aspect. The strengths of DSDM are the development process is very accurate. A given listing does have to be tested in exact order, it reduces the occurrence of mistakes in the development process.Therefore it saves much time for development software.The strengths of output in DSDM are after developers produced a product, a large number of documents will to explain the product,and there are some pretendings and documents living the product. It is really good for product. And a user manuals and training schemes will be given.It helps customer knows how to use the product and easily use the product .4.Strengths of XP(Extreme Programming)Beck (2000,pp.150) states that The practices and the principles work together with each other to create a synergy that is greater than the sum of the parts. It using established software development techniques in a microscopical team,it saves more human re beginning for company. And XP pay more economic aid to customers requirements and the tone of the products.It reduce the project risk with appropriate practices.The strengths of domain and target in XP are it can brighten specific business chore,such as projects has vague requirements. It can develop out themed software ,in-house development and fix-price contract software development.For techniques, XP use of reduplicate programming ,it remedys code quality, programmers to share knowledge more easily and it reduces mistakes in coding process. intake stand up meetings to communicate problems,it exoner ates solutions more quickly,and adjust the teams work direction in short order ,it saves to much time for team,and can make more decision for the project. Designing is used to describe requirements and to create time estimates.It helps developers reduce mistakes and make developers knows what are they need to do and need not to do in development time.Strengths of scope in XP,the planning is to fill about what problems will be wait in the development,and how to prevent them happen. It reduces the feasibility of unforeseen circumstances, Teamwork will helps teammates shares their understanding about the project and to find the weak spots of the project. Refactoring give programmers the right to improve their code , it helps the programmer understand the system better and makes the code readability. care can help the product exert its function better.The outputs are source code and associated social unit test. The strengths of XP are unit test can explains code with test cases,ma ke out up to date documentation and it can helps animadvert for new programmers. The other strength is developers always work together in a polished team, the development team will with good atmosphere.5.Weaknesses of DSDMThe weakness of DSDM is the relatively high barrier to entry. Switching to DSDM is neither cheap nor fast,and requires a significant cultural shift in any organization.(Benjamin,J. 2004)Staleton (1997,pp13) states that A way of developing application systems that truly serve the needs of the business.It have not too much equirements for the quality of the product.It only have interface intensifier business systems one application,and just can solve business problems.I think it is so shrink,such as it is not fit for other applications such as engineering, so it difficulties to be used when the target environment is not about business.The teams that in DSDM should decide what methods will be use in work. It lacks in detail for developers. It no more than packaged common sense . The iterative phases in DSDM is more tedious.6.Weaknesses of XPThe weakness of XP is that it only can be used in small group of programmers two to twelve.The objective of XP is too narrow that it does not to analysis the problems that will be happen in the time to come and it has not any strategic analysis of the need for the system .XP only define a set of techniques but not lifecycle. It relies on pair programming,but many programmers have found this way of works uncomfortable,it makes developers interdependence who work together , it also inhibit their imagination and independent thinking ability,the more important is it will make constant interaction is tiring. XP needs a robust and fast development environment, but many development environments can not grasp that standards, therefore XP can not achieve the outstrip effect for the product.Quick construct meeting are too quick,because want to save time,it maybe makes a bad design decisions. Aspect of XP that are difficult to adopt are collaboration with others in the team, and using uncomplicated designs. There involve overcoming peoples tendency to avoid collaboration and introduce needless complexity in system structure.(Beck,2000)Any product is negotiable with the customer,so that customer will feel very trouble .XP is too extreme and lacks scalability,it is too informal for many orgnisations.7.Compare the two methodsThis two methods of function are very similar. They all for application development,these two methods are all focus on shorten the development time and fast delivery,they all need teamwork and customers participation in team.There are some difference between DSDM with XP.DSDM is in the first place to provide a controlling framework for Rapid Application Development methodology .It is a framework for business centred development and it focuses on delivery of the business solution, rather than just team activity.There are more realize define roles in DSDM. DSDM use ti mebox and MoSCow to make plan about time.DSDM strongly provide full lifecycle.XP stresses customer satisfaction.It lay stress on teamwork that managers, developers and customers are all equal partners in a collaborative teaming and they will work together to improve the quality about product. It used to develop the system as faster as possible and it should be has a small teams to discuss about the system and makes a good working environment for developers. Its objective is narrow, it only used to solve some problems about the customers business needs of the product and it is not to analysis any problem about next stage. Less clear define roles.XP use grummet planning meeting to plan time.XP lights on project control and not provide lifecycle.4. Applicable contextsDSDM can be used in that contexts.Projects that is about business.Interactive function embodiment through the user interface, have clear user group,no complicated calculation, if is a large application, the function can b e decomposed into small parts , time constrained, requirements not too detailed or ameliorate and requirements can be prioritised.XP can be used in that contexts.Projects that have some specific problems need to solve,projects that are not constrained by an existing computation environment,project with vague requirements and projects with constant changes in requirements. Particularly useful for uncertain projects where change is expectedsmall group of programmers 2-12 need to have at least one client involved as comfortably as programmers and need to be able to create automated unit and function tests.5.ConclusionThese two methods aim to solve the solutions that delivering good systems in short times.They all have their own advantages and disadvantages,but them still very similar, such as customer involvement , maturational change, rapid feedback mechanisms,fast delivery, both in a small team ,and so on. Therefore I think if them work together,they should have very good effect. Because they have share the same fundamentals and it will working on combining the relative strengths of DSDM and XP.6.Evaluation frameworkDSDMXP1.PhilosophyParadigmtaxonomicScientificObjectives rile the development time as shorten as possible .Helps people who work with the system to know and how to work with the system.Make the biggest benefit for businessMake customer satisfaction.To developed the system with a good quality as soon as possible.DomainNo complicated calculation in business problems andInteractive function.XP is good at to help team who work in the same group solve some specific business problems.TargetIt only can solve business problems and it application in interface intensive business systems for all project(small and big) in all organisation(small and big).Embodiment through the user interface.It needs a clear user group.There is a time limit .If it is a large application,it can be decomposed into smaller parts of function component.XP is designed for the proje ct that with vague requirements,are not constrained by an existing computing environment and project with constant changes in requirements. It is fit for projects that can be carried out by two to twelve programmers. The type of development are fix-price contract software development,outsourced software andin-house development.2. simulationStructure mannikin andObject-oriented ModelSpiral Model3.Techniques and toolsTechniquesTimeboxing, MoSCoW , Evolutionary prototyping,Workshop .Courage, feedback, simplicity andcommunication.Planning, exploiter stories. Stand up meetings, Designing,Spike solutions , Refactor when possible, Coding,Pair programming ,Integrate often ,Testing andAcceptance tests.Tools ballpark user interface,Development tools,Requirements managementtools ,Configuration management tools ,Project management tools,Documentation tools ,Shared repository and virtualoperating environment.Automated unit testing tools must be used in XP testing process, this tools a fundame ntal requirement for a successful XP.4. ScopeFeasibility study Business study Function model iteration Design and build iteration Implementation .Exploration Planning Iterations to first release concern .5. OutputsThe output is a system that have many functions that satisfy user requirements and have some documents to maintenance it and tell user how to use it. The main product is working software of a anticipated quality. Another considerate of documents can explain the project and gives more documents and models to help user maintenance the system ,to achieve the effect of improving the quality of the products.The output is source code and associated. In another field, users and developers are all can skilled use the method. The product is working software.6. PracticeDSDM was developed by a UK consortium in the UK in the mid-1990s. This view has been supported in the work of Jennifer Stapleton(2003). It is a practitioner-based methodology and this consortium are involved in Rapi d Application Development development of software systems.DSDM can help an orgnisation achieve a good level in the Capability Maturity Model and it can be used in the TickIT.XP project was started March 1996. It is a very popular Agile method.It is very fit for a small group of programmers about two to twelve.7. ProductThe product is difference in different phase in DSDM.Pre-project pre-project report.Feasibility study feasibility report, draw plan and risk log.Business study systemarchitecture explanation, development plan, prioritised requirements list, risk log.Functional model iteration functional model and review records, non-functionalrequirements list, timeboxplans, implementation plan,risk log.Design and build iteration timebox plans ,design prototypes and review records, tested system.Implementation User documentation, delivered system, trained user population, increment review.Post-project postimplementation review report.The relationship between developers and cus tomers that work together for their project .Stories, Running code and Tests.7.DSDM for Complete SolutionsComplete Solutions is a rapid development company,and it focus on sell a complete IT consultancy military swear out for businesses.It has some branches in different cities and different country, with the rapid development, CSs size is endlessly be expanded . However at the same time , some problems become more and more obvious, such as lack of communication in the company. Therefore I think the method not only should be suit for CS company, but also can help CS solve some problem and make the company more better.I choose DSDM be used by Complete Solutions.DSDM has eight principles that focus on business need, deliver on time, meet, never compromise quality , develop iteratively, build incrementally from firm foundations, communicate continuously and clearly, demonstrate control .CS primary task is to sell a complete IT consultancy service for businesses. DSDM is about truly understanding the needs of the business and delivering solutions that work and delivering them as quickly and as cheaply as possible.(Stapleton,1997,pp14) DSDM has one principle is focus on business need. They need delivery the product to customer on time,and give a right price to customers. It is more important for CS. In DSDM project, it use MoSCoW and timebox for customers requirements. As a result is it can delivery products on-time and on -cost.Therefore DSDM can help CS save more time and reduce development costs.CS needs to software development and it must update they engine room in order to sales more products. technology and computing has become an inseparable ingredient in the business knowledge domain today.(Internet,2006) DSDM is very suitable for the project that main purpose is software development. The one principle of DSDM is develop iteratively, so it can help CS everlastingly update the software and technology .I think the issue-based task is to make a fully co mmunication in the internal of the company. Because there are poor communication in the internal of CS. Effective communication is essential to the success of any company.(Debbie Tullos,2011) DSDM is more than anything about improving communications between all parties involved in the development of system. (Stapleton,1997,pp.65) In the DSDM, there are two techniques that evolutionary prototyping and workshop, so it will helps communicate continuously and clearly. Use these two techniques can promote the communication between the internal military force of CS. Moreover, workshop can promote teamwork between internal personnel, It can helps them improve their work efficiency.Therefore it is good for CS.Never compromise quality is one principle of DSDM, we all knows that CS is a business company, so that quality is very important for it. If it can not provide a good quality product, customers will not to buy anything from CS company. Products to enhance the quality of there are more customers will buy products from CS.CS with the high speed development and its size is constantly be expanded.So they will continue to assure their infrastructure in order to meet the high speed development requirements. This requirement happen to have the same view with the principle build incrementally from firm foundations which in DSDM. Infrastructure to strengthen makes the company more invariable of the development.Through the highly collaborative and open team approach, with a no surprises culture. date has been kept to a minimum.(Timothy Fadek,2010) A highly collaborative can make the work team more unity, more powerful and more efficiency. collaborate is one of the principle in DSDM. Therefore, it will makes more unity deep down the CS company.ConclusionI think DSDM method is really be fit for Complete Solutions than XP .such as in the following aspects that applying,business,techniques, personnel management, communication, teamwork and conflict management.However, DSDM have some weaknesses,such as lacking in detail for developers and no more than packaged common sense.Therefore, if to make DSDM and XP work together,there will have better effect.