A structural analysis method

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

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  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
  

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  Data flow diagrams
  
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  Data dictionary
  
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  Decision trees
  
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  Decisions tables
  
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  Structured English
  
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  Pseudo code.
  

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  It divides a project into small modules with well-defined objectives
  
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  It performs activities in a sequence
  
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  It is time-tested simple and easily understandable by the clients and developers
  
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  It uses a process-centered technique
  
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  It uses process models to graphically describe a system
  
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  It is an approach that works from high-level overviews to lower-level details.
  

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  It is carried out in a very linear method so left a little room for mistakes
  
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  It uses different tools that can be used to carry out the system analysis like data flow diagram
  
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  Analysis is performed from different angles
  
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  It provides a step-by-step understanding so the probability of error reduces during development
  

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  A change in new system requirements means re-analyzing the system data again which is tiresome
  
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  It takes lots of time and money to analyze a system
  

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  Studying the current business environment
  
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  Modeling the old logical system
  
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  Modeling a new logical system
  
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  Modeling a new physical environment
  
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  Evaluating alternatives
  
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  Selecting the best design
  
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  Creating structured specifications.