a) What is the distinction between system verification and validation? Illustrate your answer with an example in each case. b) One way of minimizing errors in...

      

a) What is the distinction between system verification and validation? Illustrate your answer
with an example in each case.
b) One way of minimizing errors in input data is to use data coding.
(i.) State four characteristics of a good coding system.
(ii.) Describe four commonly used coding systems.
c) System performance reviews may vary in content from one organization to another but
should cover certain key areas. Describe four key areas systems performance reviews should
cover

  

Answers


gregory
a) Verification
This refers to the process of checking that data has been correctly transcribed. It involves
comparing a second transcription with a first. An example is the process of checking
password changes.
Validation
This is an attempt to build into the computer program powers of judgement so that
incorrect items of data are detected and reported. An example is before inputting data in a
computer; checks are run to prevent any error from being carried forward.
b) (i) Characteristics of a good coding
system: o It must be brief.
o It must be unambiguous/distinct.
o It must have capacity to expand/growth.
o It must be simple and easy to remember.
o It should not be bulky.
o Should be unique.
(ii) Commonly used coding
systems: o Serial coding.
o Block/group coding.
o Faceted coding.
o Mnemonic coding.
o Hierarchical coding.
c) Areas that performance reviews should cover:
o The staffing needs and whether they are more or less anticipated.
o Any delays in the processing and effects of such delays.
o Effectiveness of the inbuilt security procedures in the system.
o The error rates for input data.
o The output i.e. whether it is current, timely and distributed correctly to the relevant
users.
o Comparison of the actual system performance against the anticipated performance.
gregorymasila answered the question on February 15, 2018 at 17:16


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