2.3 Итеративный подход в разработке

2.3 Итеративный подход в разработке ПО
Итеративная разработка подразумевает наличие повторяющихся последовательных процессов выполнения работ по разработке продукта и непрерывного анализа получаемых результатов, с корректировкой последующих этапов работы. Итеративный подход коренным образом отличается от традиционных "каскадных" методик разработки ПО.
При подобном подходе в каждой итерации повторяется цикл, состоящий из четырех этапов: планирования, реализации, тестирования, анализа (англ. plan-do-check-act cycle). Преимущества итеративного подхода разработки состоят в следующих свойствах процесса разработки:
1. Влияние глобальных рисков на ранних этапах проекта сведено к минимуму, что позволяет значительно снизить затраты на их устранение.
2. Наличие эффективной обратной связи заказчика и команды разработчиков, что позволяет создавать продукт, наиболее точно отвечающий потребностям заказчика.
3. На наиболее важные и критичные детали проекта делается особый акцент.
4. Итеративное тестирование проводится непрерывно, на завершающем этапе каждой итерации, что позволяет наиболее точно оценить успешность проекта.
5. Существование конфликтов между требованиями и моделью реализации проекта обнаруживается на начальном этапе;
6. Обеспечивается равномерная загруженность всех участников проекта;
7. Наличие реальной оценки состояния разработки дает большую уверенность заказчика и остальных участников проекта в его успешном завершении.
Итеративный подход в разработке программного обеспечения в настоящее время получил достаточно широкое распространение, в рамках различных моделей гибкой методологии разработки и не только - реализацию итеративного подхода представляет собой одна из наиболее известных методологий Rational Unified Processs (RUP).
RUP – это методология, использующая итеративную модель разработки программного обеспечения, созданная компанией Rational Software для поддержки собственных продуктов. По методологии RUP ориентация разработки производится на архитектуру и управление процессом на основе прецедентов использования.
Временной период одной итерации по модели RUP составляет от 2 недель до 1,5 месяца. За это время команда разработчиков создает промежуточную версию продукта, в соответствии с поставленными в начале итерации целями. Применение методов итеративной разработки в методологии RUP позволяет с легкостью реагировать на изменение требований, устранять обнаруженные риски на начальном этапе проекта, повысить эффективность контроля качества.
Жизненный цикл разработки продукта по методологии RUP состоит из четырех этапов, каждый из которых завершается за одну или несколько итераций. Переход от одной фазы проекта к другой возможен только при условии завершения всех поставленных задач фазы. Такой переход представляет собой контрольную точку процесса разработки (milestone).

Results (English) 1:

2.3 an iterative approach to software development Iterative development implies a repeating sequential processes of product development and continuous analysis of the results, with the subsequent stages of the work. An iterative approach is fundamentally different from the traditional "cascading" of software development methodologies. Such an approach is repeated in every iteration of the loop, consisting of four stages: planning, implementation, testing, analysis (Engl. plan-do-check-act cycle). The advantages of iterative development approach consists of the following properties of the development process: 1. impact of global risks early in the project is kept to a minimum, significantly reduce the cost of their removal. 2. The existence of an effective feedback of the customer and the development team to create a product that most closely meets the needs of the customer. 3. The most important and critical details of the project places particular emphasis. 4. Iterative testing is performed continuously, at the end of each iteration, that most accurately evaluate the success of the project. 5. the existence of a conflict between the requirements and the model of the project is at an early stage; 6. Provide uniform load all project participants; 7. The existence of a real assessment of the State of design gives great confidence to the customer and the other participants in the project to its successful completion. An iterative approach to software development is now got enough widespread in different models of flexible development methodology and non-implementation of the iterative approach is one of the most famous Rational Unified Processs methodologies (RUP). RUP is a methodology that uses iterative software development model, created by Rational Software to support their own products. On the methodology of the RUP development orientation is made on architecture and process control based on the precedents of use. The time period of a single iteration of the model of RUP is from 2 weeks up to 1.5 months. During this time, the team creates an intermediate version of the product in accordance with the set objectives at the start of the iteration. Application of iterative development methodology RUP makes it easy to respond to changing requirements, eliminate identified risks at an early stage of the project, to improve quality control. Product development lifecycle methodology RUP consists of four stages, each of which culminates in one or more iterations. The transition from one phase to another is possible only if you complete all tasks in phases. This transition is a control point for the development process (milestone).

Results (English) 2:

2.3 An iterative approach to software development
Iterative development implies a repetitive sequential processes of work on product development and continuous analysis of the results, with the adjustment of subsequent stages. An iterative approach is radically different from the traditional "cascading" techniques of software development.
Such an approach is repeated in each iteration cycle consists of four phases: planning, implementation, testing, analysis (Eng. plan-do-check-act cycle). The benefits of iterative development approach consists of the following properties of the development process:
1. The impact of global risks in the early stages of the project to a minimum, which can significantly reduce the cost of their removal.
2. An effective customer feedback, and development team, allowing you to create a product that best meets the needs of the customer.
3. On the most important and critical part of the project places particular emphasis.
4. Iterative testing is done continuously at the final stage of each iteration, which allows most accurately evaluate the success of the project.
5. The existence of a conflict between the requirements and model of the project is found at an early stage;
6. It provides uniform load of all the participants of the project;
7. Have a realistic assessment of the state of development gives the customer more confidence and the rest of the project in its successful completion.
The iterative approach to software development has now got quite widespread in the various models of flexible development methodology and not only - the implementation of an iterative approach is one of the the best-known Rational Unified processs methodologies (RUP).
RUP - is a methodology that uses an iterative software development model, created by Rational Software to support its own products. According to the methodology RUP focus is made ​​on the development and management of the architecture based on the use of precedents.
The time period of one iteration model RUP is from 2 weeks to 1.5 months. During this time, the development team creates an intermediate version of the product, in accordance with the intended objectives at the beginning of the iteration. Application of iterative development methodology RUP makes it easy to respond to changing requirements, to eliminate risks identified in the initial phase of the project to increase the effectiveness of quality control.
The life cycle of product development methodology RUP consists of four stages, each of which terminates in one or more iterations. The transition from one phase of the project to another is only possible subject to completion of all tasks phase. This transition is a process of developing a control point (milestone).

Results (English) 3:

2.3 An iterative approach in the formulation of
iterative development implies a repeating consecutive processes for the implementation of product development, and continuous analysis of the results,With the adjustment follow-up stages of the work. An iterative approach is fundamentally different from the traditional "cascading" development methodologies for.
when such an approach in each iteration is repeated cycle,consisting of four stages: planning, implementation, testing, analysis (imp. plan-do-check-act cycle). The benefits of an iterative approach consists in the process of formulating the following properties:
1.Influence of global risks in the early stages of the project kept to a minimum, that can significantly reduce the costs to resolve them.
2. The presence of an effective customer feedback and development teams,That allows you to create a product, most accurately meets customer needs.
3. For the most important and critical part of draft placed special emphasis.
4. Iterative testing is carried out continuously,At the final stage of each iteration, that allows you the most accurately assess success project.
5. The existence of a conflict between the requirements and the model of the project is detected at an early stage;
6.Provides uniform workload all participants in the project;
7. The existence of a real assessment of the state of design gives greater confidence that customer, and the other participants in the project to its successful conclusion.
An iterative approach to software development is currently received a sufficiently broad dissemination,Within the framework of various models and methodologies for the development of a flexible not only - the implementation an iterative approach is one of the most well-known methodology for Rational Unified Prосesss (SESC) .
SESC - this methodology,Using an iterative model of software development, created by rational software to support their own products.On the methodology of SESC orientation is on the architecture, and the management of the process on the basis of precedents.
an interim period of one iteration of model SESC is from 2 weeks to 1.5 months.During this time the team creates an intermediate version of the product, in accordance with the goals set at the beginning of each iteration.The use of methods in an iterative development methodology version control tools allows you to easily respond to changing requirements, to address identified risks in the initial phase of the project,To enhance the effectiveness of monitoring quality.
product development life cycle methodology to SESC consists of four phases, each of which is completed for one or more iterations.The transition from one phase of the project to the other is possible only when conditions the completion of all tasks phase. Such a transition is a milestone, the development process (milestone) .