A structural analysis method



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Edrine

a)STRUCTURAL ANALYSIS METHOD

is a developmental method that allows the analyst to understand the system and its activities in a logical way.



  • It is a systematic approach which uses graphical tools that analyze and refine the objectives of an existing system and develop a new system specification which can be easily understandable by the user

Tools include:

  • Data flow diagrams

  • Data dictionary

  • Decision trees

  • Decisions tables

  • Structured English

  • Pseudo code.

CHARACTERISTICS

  • It divides a project into small modules with well-defined objectives

  • It performs activities in a sequence

  • It is time-tested simple and easily understandable by the clients and developers

  • It uses a process-centered technique

  • It uses process models to graphically describe a system

  • It is an approach that works from high-level overviews to lower-level details.

ADVANTAGES

  • It is carried out in a very linear method so left a little room for mistakes

  • It uses different tools that can be used to carry out the system analysis like data flow diagram

  • Analysis is performed from different angles

  • It provides a step-by-step understanding so the probability of error reduces during development

DISADVANTAGES

  • A change in new system requirements means re-analyzing the system data again which is tiresome

  • It takes lots of time and money to analyze a system

STEPS INVOLVED IN THE STRUCTURED ANALYSIS PROCESS

  • Studying the current business environment

  • Modeling the old logical system

  • Modeling a new logical system

  • Modeling a new physical environment

  • Evaluating alternatives

  • Selecting the best design

  • Creating structured specifications.


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