Introduction to SAD

FUNDAMENTALS OF SYSTEM

System & It's characteristics , look at it's definition each and every word is well meaning and the characteristics can be derived from definition.

What is a system ?
System can be defined as orderly grouping of independent components linked together according to a plan to achieve a specific goal.
Each component is a part of total system and it has to do it's own share of work for the system to achieve the desired goal.

What are the characteristics of system ?

• Organization : Implies structure and order . It is an arrangement of components to achive objectives.
• Interaction : Refers to the procedure in which each component functions with other components of the system.
• Interdependence : One component of the system depend on other component of the system.
• Integration : It concerned with how the system tiged together . It mens a part of system is work together with the system even though each part perform a unique function.
• Central Objective : The central objective must be known well in advance.
  

What are the classifications of system ?
System may be classified in to 4 depending on it's nature

• Formal or Informal System : Formal system is planned in advance and is used according to schedule.eg: Conducting a scheduled meeting at end of every month.Informal System is word on as need basis ,not accoording to a schedule and not described by procedures. eg :Sales order processing through telephonic calls.
• Physical or Abstract System :Physical Systems are tangiable entities that may be static or dynamic .eg: computer system, vehicle, building etc..
• Open or Closed System :Open System is a system within it's envirnment .it receive input from environment and provide output to environment. Eg: Any real life system , Infromation system ,Organisation etc..Closed System is isolated from enviromnent influences.It operate on facts with in the system itself . It include a feedback loop, a control element & feedback performance standard.
• Manual or Automated System : Manual Systrem which requires human interaction. eg: face to face information center at places like railway station. Automated System which doesn't requires human interaction all automatic. eg: Trafic control system.