Lesson 5 Process Modeling

PHASE 2 :

SYSTEM ANALYSIS

LESSON 5

PROCESS MODELING

INTRODUCTION

In the previous lesson, we have learned data modeling. Data modeling is a technique for defining business requirements for database. After we have completed the data modeling with an ER-Diagram, we can continue with the process modeling. In this lesson, we will continue the discussion on process modeling. We will discuss how the requirements definition and use cases are further defined into a process model. In this lesson, our focus on one tool that is used to represent the information gathered as parts of requirements gathering – data flow diagram. This lesson consists of four sections :

* Overview of process modeling

* DFD symbols

* Drawing DFD

* Use Case

LEARNING OUTCOMES

At the end of this lesson, students should be able to :

* define process modeling

* differentiate DFD symbols

* draw DFD

* use a case as a process modeling

TERMINOLOGY

No | Word | Definition |

1 | Context diagram | A diagram that shows the system boundaries, external agents that interact with the system and major flows between them |

2 | Data flow | A data that is input or output to or from a process |

3 | Data flow diagram | A process model used to depict the flow of data through a system and work done by the system |

4 | Data store | A stored data intended for later use |

5 | External agents | An outside person, organization unit, system or other organization that interact with the system |

6 | Process | A work performed by a system in response to incoming data flows or conditions |

7 | Process modeling | A process-centered technique used to organize and document a system’s processes |

5.1 OVERVIEW OF PROCESS MODELING

System

Planning

System

Analysis

System

Design

System

Implementation

System

Maintenance

Requirements Gathering

Data Modeling

√ Process...