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Structured English

 

Structured English in System Analysis and Design

Structured English is a technique used in system analysis and design to describe the logic of a system's processes in a clear and concise way. It combines the readability of natural language with the precision of programming constructs.

Here's a breakdown of its role:

  • Purpose: Clearly document the steps involved in a system's functionalities.
  • Benefits:
    • Improves communication between analysts, designers, and users by using familiar language with a structured approach.
    • Enhances the clarity and maintainability of system design documents.
    • Aids in identifying potential flaws in the logic before coding begins.
  • Structure:
    • Uses a limited set of English verbs like "display," "calculate," "update," etc.
    • Incorporates control flow keywords like "IF," "WHILE," "FOR EACH" for decision-making and loops.
    • Avoids unnecessary adjectives and adverbs for better focus.

Relationship to Structured Analysis and Design (SA/SD):

Structured English is one of the tools used within the SA/SD methodology. SA/SD is a systematic approach for developing software systems. Here's how they work together:

  1. Structured Analysis: Analyzes the existing system (if applicable) and defines the requirements for the new system. This might involve Data Flow Diagrams (DFDs) to map data flow and functionalities.
  2. Structured Design: Uses the analysis results to design the new system's architecture. Structured English comes into play here to describe the logic within each process or function identified in the DFDs.
  3. Coding: The structured English descriptions are then translated into actual programming code.

Overall, Structured English helps bridge the gap between the high-level requirements of a system and the detailed code that implements it.

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