(i) Validation
This refers to the process by which a computer system identifies and reports incorrect data
items. Validation occurs during data processing.
Validation checks that should be incorporated into the program:
1.Sequence checks e.g. checking whether employee numbers are in sequence
2.Limit checks. For instance, salaries of employees should be checked within a
certainlimit e.g. not more than Ksh 2,000,000
3.Range checks- could be used to check the correctness of processed salaries.
4.Validity checks for coded data. For instance, marital status of employees could
bechecked for M (i.e. married) or S (i.e. single) and anything else should be rejected.
5.Reasonableness check. For instance, a processed pay slip, which indicates a
negativesalary, should be investigated for error.
6.Existence check to ensure that all fields of a file contain an entry after data entry
iscomplete.
7.Check digits- to detect transcription and transposition errors.
(ii) Testing enables errors in the software to be identified and corrected before the software is
implemented. This testing ensures that the implemented system is highly reliable and free from
error.
(iii) Measures that must be taken to simplify user training and support:
1. Use of an online training and support system
Online training and support would be easily available to users at any time. The training and
support could be provided at a specific site in the intranet (Organization‘s computer network)
with multimedia (Text, sound and graphics) used to enhance understanding.
1. Training schedules could be supplied to system users so that they know in advance
howlong the training is supposed to take and what is expected of them during the
training. This would improve user cooperation and thus simplify the training.
2. Training should be carried out in phases so that users are gradually familiarized with
theinformation system. A general timing approach to be used could be as follows:
o Before the feasibility study whereby the users are given a general explanation
ofcomputer systems and their relevance in function application and reason for the
desire to introduce a computer in the specific functions on the organization.
o Before investigation where users are explained about the impact of the new
systemand the importance of their involvement in development.
o During fact finding so that they can cooperate and provide useful information
toguide the system developer during the analysis phase of SDLC.
o Before programming so that they can prepare themselves for specific roles at
theimplementation stage. These may include testing activities or roles.
o Before implementation to enable users cooperate and play their roles as assigned
tothem.
o After implementation in order to assist in evaluation of system performance.
gregorymasila answered the question on November 21, 2017 at 09:04
- Outline the service factors to consider before procuring a computer.(Solved)
Outline the service factors to consider before procuring a computer.
Date posted: November 21, 2017. Answers (1)
- It is claimed that data required to support strategic planning differs from data required to support operational decisions in terms of the time period referred to...(Solved)
It is claimed that data required to support strategic planning differs from data required to
support operational decisions in terms of the time period referred to and the source or origin of the data.
Required:
Briefly describe how data required to support strategic planning differs from that required to
support operational
decisions in terms of:
(i) Time period referred to.
(ii) The source or origin of the data.
Date posted: November 21, 2017. Answers (1)
- Outline advantages of using bureaux as a way of acquiring a computer.(Solved)
Outline advantages of using bureaux as a way of acquiring a computer.
Date posted: November 21, 2017. Answers (1)
- Outline the disadvantages of leasing a computer.(Solved)
Outline the disadvantages of leasing a computer.
Date posted: November 21, 2017. Answers (1)
- Outline the advantages of leasing a computer.(Solved)
Outline the advantages of leasing a computer.
Date posted: November 21, 2017. Answers (1)
- Outline the disadvantages of renting a computer.(Solved)
Outline the disadvantages of renting a computer.
Date posted: November 21, 2017. Answers (1)
- Outline the advantages of purchasing a computer.(Solved)
Outline the advantages of purchasing a computer.
Date posted: November 21, 2017. Answers (1)
- Outline three functionalities or tools that an automated software development tool requires(Solved)
Outline three functionalities or tools that an automated software development tool requires.
Date posted: November 20, 2017. Answers (1)
- Suggest three types of decisions that electronic point of sale system can support indicating sales information required to support each decision.(Solved)
Suggest three types of decisions that electronic point of sale system can support indicating sales information required to support each decision.
Date posted: November 20, 2017. Answers (1)
- Give four possible courses of action that may be taken to overcome the shortage of staff and thus allow full implementation of the system(Solved)
Give four possible courses of action that may be taken to overcome the shortage of staff and thus allow full implementation of the system.
Date posted: November 20, 2017. Answers (1)
- In conducting a cost-benefit analysis, state any three cost items and any three intangible benefits you would consider(Solved)
In conducting a cost-benefit analysis, state any three cost items and any three intangible benefits you would consider
Date posted: November 20, 2017. Answers (1)
- Why is it essential to make periodic reviews of information systems projects(Solved)
Why is it essential to make periodic reviews of information systems projects
Date posted: November 20, 2017. Answers (1)
- Examine four reasons that may make an organisation outsource some of its non-core information technology activities or services.(Solved)
Examine four reasons that may make an organisation outsource some of its non-core information technology activities or services.
Date posted: November 20, 2017. Answers (1)
- Briefly explain the following programming objectives:(i) Utility. (ii) Reliability.(Solved)
Briefly explain the following programming objectives:
(i) Utility.
(ii) Reliability.
Date posted: November 20, 2017. Answers (1)
- The company for which you work is currently facing financial crisis. The financial controller has proposed that the company should seek for alternative sources of...(Solved)
The company for which you work is currently facing financial crisis. The financial controller has proposed that the company should seek for alternative sources of software. One of the options available is that of freeware from the Internet and magazine vendors. As the organisation's information technology manager, advise on the implications of adopting this proposal.
Date posted: November 20, 2017. Answers (1)
- Identify the major factors that influence the structure of an information system(Solved)
Identify the major factors that influence the structure of an information system
Date posted: November 20, 2017. Answers (1)
- Propose the type of information system you would recommend for the following applications: (i) Maintenance of general ledger (ii) Formulation of competitive market strategies (iii) Financial sensitivity...(Solved)
Propose the type of information system you would recommend for the following applications:
(i) Maintenance of general ledger
(ii) Formulation of competitive market strategies
(iii) Financial sensitivity or risk analysis.
(iv) Ticket reservations.
Date posted: November 20, 2017. Answers (1)
- Explain the application of Internet in the following areas:(i) Healthcare.(ii) Banking.(Solved)
Explain the application of Internet in the following areas:
(i) Healthcare.
(ii) Banking.
Date posted: November 20, 2017. Answers (1)
- State any six components of an information system that you would propose for an accounting system of an organization(Solved)
State any six components of an information system that you would propose for an accounting system of an organization
Date posted: November 20, 2017. Answers (1)
- Explain the following systems concepts: (i) Differentiation. (ii) Entropy.(Solved)
Explain the following systems concepts:
(i) Differentiation.
(ii) Entropy.
Date posted: November 20, 2017. Answers (1)