Buisness Process Modelling Tools

A decidion table displays actiosn to be taken whena  specific condition occurs.

Diagrams that show the nessicary steps of a task or system, each step is represented by a symbol with connection lines to show step by step progression.

+ good way to communication details in a task

+ excellent way to document stages

+ analyse problems in process

+ act as a guide in development

- confsuing

- cannot show very complex processes

Used for main flow of information within an organisation , analyst checks of flow of infoprmation.

Describes the data flow within the sytem and the main system can be broken down into subsystems. All processes must have an input and an output, data enters the system form an external enviroment.

Level 0 - Shows whole system

Level 1 - Main Proceses

Level 2 - Breaks down each main process

Flow Charts (FC)

Information Flow Diagram (IFD)

Data Flow Diagram (DFD)

Entity Realtionship Diagram (ERD)

Decision Table

Why they are needed:

+ demonstrate proposal to client

+ show how new system works

+ demonstrate data and info flow in new system

+ act as guide to developement of system