Analysis within the Systems Development Life-Cycle

Analysis within the Systems Development Life-Cycle

Book 4 Activity Analysis—The Methods

1st Edition - January 1, 1987

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  • Author: Rosemary Rock-Evans
  • eBook ISBN: 9781483136950

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Description

Analysis within the Systems Development Life-Cycle: Book 4, Activity Analysis—The Methods describes the techniques and concepts for carrying out activity analysis within the systems development life-cycle. Reference is made to the deliverables of data analysis and more than one method of analysis, each a viable alternative to the other, are discussed. The ""bottom-up"" and ""top-down"" methods are highlighted. Comprised of seven chapters, this book illustrates how dependent data and activities are on each other. This point is especially brought home when the task of inventing new business activities is discussed, and the data model is changed with completely new entity types—the invention of the user and analyst being added—and ""old"" entity types being removed when the activities of the business are changed. The relevance of PROLOG, LISP, knowledge bases, and expert systems is considered, and these areas of interest are brought together into the fold of ""conventional"" systems development. Finally, this text shows how the ""rules"" of the knowledge base and the ""deduction"" clauses are directly related to the activity concepts. This monograph will be a valuable resource for systems analysts and designers and those who are involved in expert systems.

Table of Contents


  • Preface

    Introduction

    Acknowledgments

    Chapter 1 Introduction

    1 The Systems Development Cycle (SDC)

    A Reminder: Tasks of Analysis: Inputs to the Task

    Chapter 2 Analysis of the Existing System—Synthesis (Continued)

    1 Introduction

    2 Convert Input to Deliverable Form

    Convert Real World Input

    Analyze Existing Systems Design/Convert Design Abstractions

    3 Match Bottom-up and Top-Down Results

    A Bottom-up Activity Has No Top-Down Activity

    A Bottom-up Activity Can be Matched with a Top-Down Activity

    A Top-Down Activity Has No Bottom-up Activity

    4 Refine the Result

    Verify Using the Basic Consistency Checks

    Extract the Data andUpdate the Data Model

    Summary

    5 Summary

    Top-Down Analysis

    Bottom-up Analysis—using Activity Occurrences

    Bottom-up Analysis of Design

    Chapter 3 Evaluate the Existing System Solution

    1 Introduction

    2 Identify the Problems

    Isolate Problems

    Relate Problem to Desired and Actual States

    3 Investigate Effect

    4 Determine Cause

    The Cause of the Problem is Identified

    The Cause is Related to the Effect

    The Cause is Related to the Activities

    5 Identify the Advantages of the Existing Approach

    6 Determine Need for Change

    Deciding Whether Change is Needed

    Decide What Changes are Needed

    7 Summary

    Chapter 4 Specify the New System and Choose the Solution

    1 Introduction

    2 Propose the New Solution

    Identify Constraints on Business Change

    Invent New Business Solution

    3 Verify/Test Out Solution

    Quality Control Test

    Tests for Logical Correctness

    Tests for Feasibility

    Tests On Working Feasibility—The Prototype

    4 Approval

    5 Evaluate the Solutions

    Determine and Score the Advantages

    Determine and Score Disadvantages

    6 Choose the Solution

    Choosing

    Update the Data Model/Record Result

    7 Summary

    Chapter 5 Perform the Completeness Checks

    1 Introduction

    2 Perform the Completeness Tests (at a Level)

    Entity/Activity Matrix Check

    Relationship/Activity Matrix Check

    Entity State/Activity Matrix

    Refinement—the Search for Common Activities

    Obtain Approval of Level of Decomposition

    3 Pre-Planning/Pre-Specification Calculations

    Derive the User/Activity/Entity Access Matrix

    Determine the Partitions of Interest

    Produce User Access Authorization to Entity Type

    Derive Entity Type/Group Partitioning

    Derive Entity Type Distribution

    Derive Occurrences by Partition

    Derive Archiving Rules

    Derive Partioned Degree

    Derive Distribution of Activities by Organization Unit/Location

    Chapter 6 Specification of Elementary Activity Logic

    1 Introduction

    What is the Specification of Activity Logic?

    Why Do We Specify It?

    Is This the End Point of Analysis?

    Are There Other Ways of Specifying the Logic?

    When Do We Know When to Start the Specification?

    Are There Similarities with Top-Down and Bottom-up?

    Should all Analysts Produce the Same Results?

    What are the Main Tasks?

    Is it Too Detailed for the Analysis Stage?

    Structured English Does Not Seem User Friendly

    Specification Using Structured English Seems a Lot of Work

    Are There Any Other Important Points?

    Summary

    2 Analysis of the Existing System

    Analysis of Activities

    User Approval

    Evaluate the Existing Elementary Activity Logic

    3 Specify the New System

    Propose the New Solution

    Verify/Test That the Description Works

    User Approval

    Evaluate the Solution(s)

    4 Choose the Solution

    Choose

    Record the Result

    5 Final Verification and Refinement

    Introduction

    Perform Completeness Tests

    6 Summary

    Chapter 7 Summary

    1 Introduction

    2 Summary of Tasks

    Preparation

    Collection

    Analysis (of Existing System)

    Specify New System

    Choose Solution

    Perform Completeness Check

    3 The Final Meta-Model

    4 Conclusion

    What Have the Books Shown?

    The Level of Detail in These Books

    How Will the Methods Evolve?

    Opportunities for Automation

    Glossary and Acronyms

    Index

Product details

  • No. of pages: 396
  • Language: English
  • Copyright: © Pergamon 1987
  • Published: January 1, 1987
  • Imprint: Pergamon
  • eBook ISBN: 9781483136950

About the Author

Rosemary Rock-Evans

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