Structure Chart

Introduction

• A structure chart provides a visual representation of a program’s structure, making it easier to understand and modify.

Definition

• A structure chart is a type of diagram used in software engineering to illustrate the structure of a program or system.
• The structure is a graphical representation of the modules, functions, and processes within a program, showing how they are related and how they interact with each other.
• A structure chart is a visual representation of the organization of a computer program.
• The structure is a hierarchical diagram that illustrates the flow of control within a program, showing the various modules or functions that make up the program and how they interact with one another.

Characteristics

• Architecture of Structure Chart :
  • A typical structure chart consists of a series of rectangles/boxes or other shapes, each representing a module or subsystem, or function within the program. The rectangles are connected by arrow lines that indicate the flow of control/data between the different parts of the program.
  • Each module in a structure chart is shown as a box with its name and any input or output parameters it requires.
  • The lines connecting the boxes show the sequence in which the modules are executed.
  • The top box in the structure chart represents the main module or program, which is executed first. The main module then calls other modules in sequence as required, and the flow of control follows the lines connecting the boxes.
• The purpose of a structure chart is to aid in the design, development, and maintenance of complex systems by breaking them down into smaller, more manageable components.
• It also helps to identify potential errors and improve program efficiency.
• Structure charts are particularly useful in the development of large software systems, as they help to identify and manage the complexity of the system by breaking it down into smaller, more manageable components.
• They can also aid in the communication of system design to other stakeholders, such as developers, testers, and end-users.
• The structure chart is often used in conjunction with other software engineering diagrams, such as flowcharts, data flow diagrams, and entity-relationship diagrams, to help developers understand the overall structure of a system and how its various components fit together.