Text B: System Analysis

System analysis involves a detailed study of the current system, leading to specifications of a new system. Analysis is a detailed study of various operations performed by a system and their relationships within and outside the system. During analysis, data are collected on the available files, decision points and transactions handled by the present system. Interviews, on-site observation and questionnaire are the tools used for system analysis. Using the following steps it becomes easy to draw the exact boundary of the new system under consideration: a) keeping in view the problems and new requirements, b) workout the pros and cons including new areas of the system.

All procedures, requirements must be analysed and documented in the form of detailed data diagrams (DFDs), data dictionary, logical data structures and miniature specifications. System Analysis also includes sub-dividing of complex processes involving the entire system, identification of data store and manual processes.

The main points to be discussed in system analysis are:

· Specification of what the new system is to accomplish based on the user requirements.

· Functional hierarchy showing the functions to be performed by the new system and their relationships with each other.

· Function networks which are similar to function hierarchy but they highlight those functions which are common to more than one procedure.

· List of attributes of the entries — these are the data items which need to be held about each entry (record).

Mark the following statements as true or false.

1) System analysis involves an in-depth study of a new system, leading to specifications of the current system.

2) Questionnaire, interviews and on-site observation are the tools used for system analysis.

3) The project team usually document the current system using procedures and interviewing people.

4) The exact boundary of the new system can be drawn keeping in view the problems and new requirements, workout the pros and cons of the system.

5) The main issues to be considered in system analysis are: a) analysing the purpose of the information system, b) function networks which are different from function hierarchy.

Put the letters in the following words into the correct order.

1) cinafecisopit; 2) derpucore; 3) cehirhyar; 4) trequemirens; 5) abilavela;

6) ateuqinirsone; 7) fidicitanotine

<== попередня сторінка	\|	наступна сторінка ==>
Read the sentences choosing the correct word in bold type.	\|	Text C: Qualities of Information

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