Writing Effective Use Cases Writing Effective Use Cases Alistair Cockburn Humans and Technology in preparation for Addison-Wesley Longman‚ Q3 2000. ©A.Cockburn 1999 Page 1 of 204 Writing Effective Use Cases Prologue There are still no trusted guides about how to write (or review) use cases‚ even though it is now nearly a decade since use cases have become the "norm" for writing functional requirements for object-oriented software systems‚ and are gaining acceptance for embedded software
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Level | Confidence | Use Case Specification Revision History Revision date | Version # | Summary of Changes | Author | Changes marked | Approvals Name & Title | Role | Date of Approval | Approval | Table of Contents 1 Introduction3 1.1 Purpose of Document3 1.2 BA Confidence Rating Rationale3 1.3 Supporting Documentation3 1.4 Peer Review3 1.5 Distribution3 2 Overview4 2.1 Document Purpose4 2.2 Context4 3 <<Title>>4
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ACTIVITY DIAGRAMS IN UML Activity Diagrams WHAT IS AN ACTIVITY DIAGRAM? Activity diagrams consist of activities‚ states and transitions between activities and states. Activity diagrams combine ideas from event diagrams‚ Petri nets and state modeling techniques An activity diagram is a special case of state charts in which most or all states are activity states and most or all transitions are triggered by the completion of activities in the source state. What is an Activity Diagram? The
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Task A. CLASS DIAGRAM B. Use Case Event | Trigger | Source | Use Case | Response | Destination | Request for car rental | Reservation call | Customer | Reserve vehicle | Vehicle availability status | Passengers | Pickup vehicle | Pickup date | Customer | Pickup vehicle | Car rental system update | Staff | Vehicle return | Due date for rental | Customer | Vehicle return | Car rental system update | Staff | Generate Bill | Vehicle Return | Operator | Bill | Update System |
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Problem Statement As the head of Information Technology at Acme‚ Inc.‚ you are tasked with building a new payroll system to replace the existing system which is hopelessly out of date. Acme needs a new system to allow employees to record time card information electronically and automatically generate paychecks based on the number of hours worked and total amount of sales (for commissioned employees). The new system will be state of the art and will have a Windows-based desktop interface to allow
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with Use Cases McGraw-Hill/Irwin Copyright © 2007 by The McGraw-Hill Companies‚ Inc. All rights reserved. Objectives • Describe the benefits of use-case modeling. • Define actors and use cases and be able to identify them from context diagrams and other sources. • Describe the relationships that can appear on a usecase model diagram. • Describe the steps for preparing a use-case model. • Describe how to construct a use-case model diagram. • Describe the various sections of a use-case narrative
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Use case name: Request for Plotter sheet ID: 1 Importance level: High Primary actor: Student Short description: Events to happen when requesting for a plotter sheet. Trigger: Filled in Plotter Sheet Type: External Major Inputs Major Outputs Description Source Description Destination Subject Student EDP Code Student Filled in Plotter sheet Student Time Student Days Student Room No. Student Major Steps Performed Information for Steps
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Figure 3.4 describe the use case diagram of Top Management Visitor Appointment System. There are three type of actor involved in the systems which are top management‚ visitor and Auxiliary Police Officer. Top management need to login to access the system. Top management need to schedule
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Use Cases are not inherently object-oriented. Why then is use case modelling so important in the Object-Oriented approach? Discuss. Most projects have failed due to the problem of clarity in requirements. Requirements serve as a key part of system development since it is an input to system development and “a system” is produced as the output. Therefore if the requirement stage is wrong‚ the whole system will be wrong. Hence‚ the project fails. Input output Requirements System
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Generating Test Cases From Use Cases by Jim Heumann Requirements Management Evangelist Rational Software In many organizations‚ software testing accounts for 30 to 50 percent of software development costs. Yet most people believe that software is not well tested before it is delivered. That contradiction is rooted in two clear facts: First‚ testing software is a very difficult proposition; and second‚ testing is typically done without a clear methodology. A widely-accepted tenet in
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