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What the factors designer should consider to achieve goal.

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Physical file structures must be designed to be efficient and workable. Under explain factors that the designer should consider to achieve this goal.

  • The purpose of the file. What will the file be used for, is it used online and can it be updated online?
  • Availability of hardware. What file organizations are possible on the existing hardware, are hardware upgrades possible?
  • Method of access. Is on-line access required, will it be for inquiry only or will there be updates, what are the future requirements?
  • File activity. How is the file likely to be accessed, how many records will the file have to access?
  • File volatility. How often will records be added or deleted from the file, is this frequency likely to change?
  • File size. Is it large or small, can large files be split into smaller ones?
  • Output requirements. How the file will be processed, it should allow for different process and output requirements.
  • File requirements. Will the file be affected by one transaction at a time or will the transactions be batched?
  • File sorting. Do sorting requirements justify the use of an index or the splitting of files into smaller files?
  • Cost. The allocation of greater storage space, which would mean greater hardware costs, could be justified by an increase in processing speed.
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