PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 1.

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PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 1 Анализ и дизайн систем. Alan Dennis, Barbara Wixom, and David Tegarden John Wiley & Sons, Inc. Slides by Fred Niederman

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 2 Copyright © 2001 John Wiley & Sons, Inc. All rights reserved. Reproduction or translation of this work beyond that permitted in Section 117 of the 1976 United States Copyright Act without the express written permission of the copyright owner is unlawful. Request for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. The purchaser may make back-up copies for his/her own use only and not for redistribution or resale. The Publisher assumes no responsibility for errors, omissions, or damages, caused by the use of these programs or from the use of the information contained herein.

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 3 Моделирование Use-case (вариантов использования) Глава 6

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 4 Ключевые идеи Use case иллюстрирует деятельность пользователей системы Use case это логические модели – они описывают функциональную работу системы, без описания технологической стороны.

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 5 Описание USE-CASE

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 6 Что такое описание Use-Case? Описание основных функций системы Что может делать пользователь Как реагирует система Use case это основные элементы для продолжения дизайна

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 7 Как создаются Use-Case? Два шага: Текстовое описание вариантов использования Перевод описаний в диаграммы Описывает одну, и только одну функцию, но может быть разветвлённым. Работа с пользователями над содержанием

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 8 Типы Use-Case Общая картина, либо детализация Необходимость, либо реальность

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 9 Элементы описания Use- Case Имя Use Case:ID:Уровень значимости: Основное лицо:Тип Use Case: Заинтересованные лица: Краткое описание: Опасные моменты: Отношения и связи: (Ассоциации, Включённые, Расширение, Обобщение) Нормальное течение событий: Дополнительные события: Альтернативные/Исключительные события:

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 10 Правила создания описания Use-Case Напишите каждый шаг в форме“SVDPI” Проясните инициатора и потребителя действия Пишите с точки зрения стороннего наблюдателя Пишите всё на одном уровне обобщения (абстракции) Проверьте чувствительные наборы шагов Либерально применяйте принцип KISS Напишите повторные инструкции для повторения набора шагов.

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 11 Ваша очередь! Как вы сможете сделать сбор требований (интервью, анкеты, наблюдения и анализ документов) более эффективным, зная что в итоге вы будете создавать описания и диаграммы Use-Case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 12 ДИАГРАММЫ USE-CASE

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 13 Синтаксис диаграмм Use- Case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 14 Диаграмма Use-Case для системы встреч

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 15 Диаграмма Use-Case c указанным лицом

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 16 Связи расширения и включения

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 17 СОЗДАНИЕ ОПИСАНИЙ И ДИАГРАММ USE-CASE

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 18 Основные шаги написания Use-Case Выявление основных use-case Расширение основных use- case Подтверждение основных use- cases Создание диаграммы use-case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 19 Выявление основных use-case Выявление границ системы Перечисление основных лиц Перечисление целей каждого основного лица Выявить и написать основные use- case Тщательно проверить use-case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 20 Расширение основных use-case Выберите один основной use-case для расширения Детально заполните шаблон use-case Заполните шаги нормального течения событий Нормализуйте каждый шаг Опишите альтернативный или исключительные события Упростите или организуйте, если необходимо

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 21 Подтверждение основных use-cases Проверьте текущий набор Учитывайте синтаксис и семантику Подключение пользователей помогает Итеративно повторяйте все шаги, пока не определите все use-case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 22 Создание диаграммы use-case Начните с границ системы Поместите элементы по- порядку для упрощения чтения Разместите лица на диаграмме Закончите, соединяя линиями лица и use case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 23 Выбор подходящей технологии Интервью JAD Анкетирование Анализ Наблюдение документов Тип As-Is As-Is As-Is As-Is As-Is информации Улучшение Улучшение Улучшение To-Be To-Be Глубина Высокая Высокая Средняя Низкая Низкая информации Широта Низкая Средняя Высокая Высокая Низкая информации Интеграция Низкая Высокая Низкая Низкая Низкая информации Участие Среднее Высокое Низкое Низкое Низкое пользователей Стоимость Средняя Низкая- Низкая Низкая Низкая- Средняя Средняя

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Выявление основных use-case Расширение основных use- case Подтверждение основных use- cases Создание диаграммы use-case

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 25 Ваша очередь! Создайте набор use case для расселения в общежитиях. Учтите шаги по регистрации для расселения в общежитие, записи в конкретный корпус, подбору соседей и переезду.

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 26 Резюме Описания Use-case это основа для дальнейшего анализа и дизайна. Они создаются на основе 7 правил и 13 шагов. Диаграммы Use-case дают графический обзор основного функционирования системы.

PowerPoint Presentation for Dennis, Wixom & Tegardem Systems Analysis and Design Copyright 2001 © John Wiley & Sons, Inc. All rights reserved. Slide 27 Дополнительные ресурсы Для получение дополнительных ресурсов по use-case и многим другим темам объектно0ориентированного подхода смотрите сайт: