ICT2621 Assignment 3
(COMPLETE ANSWERS)
2025
[Document subtitle]
[School]
[Course title]
, ICT2621 Assignment 3 (COMPLETE ANSWERS) 2025
Course
Structured Systems Analysis and Design (ICT2621)
Institution
University Of South Africa (Unisa)
Book
Systems Analysis and Design
ICT2621 Assignment 3 (COMPLETE ANSWERS) 2025 - DUE August 2025; 100% TRUSTED
Complete, trusted solutions and explanations.
Question 1 As a systems analyst, when designing systems, one of your goals should be to build
systems that are effective, reliable, and maintainable. Briefly explain each of these three factors.
(9) What is Human-Computer Interaction (HCI)? (3) What are the seven habits of successful
interface designers? (7) Use the internet to find the ISO 9241-11 standard definition of usability
with respect to computer interfaces. (2) NB: The following is a self-assessment activity. Attempt
the question but do not submit the answer for marking. The solution will be made available
with the assignment feedback. The most used forms of output technology for business systems
are still in the form of screen displays and printed matter. List other current output types and
technologies currently available. [30 Marks] When drawing data flow diagrams (DFDs), use the
Gane and Sarson symbols/notation set. Draw, name and describe the four symbols used in a
data flow diagram (DFD). You may use a table to present your answer. (12) Briefly describe the
following with respect to DFDs: – Levelling (3) – Balancing (3) – Data dictionary (3) Draw a
diagram of an example of each of the following showing the process, and the input(s) and
output(s), where applicable. You should name each process, input or output used. Do not use
the examples from the prescribed textbook; rather, use them as guidelines. – Spontaneous
generation (3) – Black hole (3) – Gray hole (3) NB: The following are self-assessment activities.
Attempt the questions but do not submit them for marking. Solutions will appear in Tutorial
Letter 202. What are the six guidelines for drawing DFDs? Define Structured English and list its
guidelines. Draw the context diagram of the Order System provided in Figure 5-11 on page 155
of your prescribed book. Using this diagram, explain what the system does. In your explanation,
include what the Order System sends or receives from each of the external entities. Use the two
diagrams in Figure 5-12 on page 156 of the prescribed book to explain the difference and
similarities between a context diagram and diagram 0. Here we are interested in the general
differences or similarities between a context diagram and diagram 0; you can use Figure 5-12 as
the point of reference if you need to provide an example. [24 Marks] Scenario: The African
(COMPLETE ANSWERS)
2025
[Document subtitle]
[School]
[Course title]
, ICT2621 Assignment 3 (COMPLETE ANSWERS) 2025
Course
Structured Systems Analysis and Design (ICT2621)
Institution
University Of South Africa (Unisa)
Book
Systems Analysis and Design
ICT2621 Assignment 3 (COMPLETE ANSWERS) 2025 - DUE August 2025; 100% TRUSTED
Complete, trusted solutions and explanations.
Question 1 As a systems analyst, when designing systems, one of your goals should be to build
systems that are effective, reliable, and maintainable. Briefly explain each of these three factors.
(9) What is Human-Computer Interaction (HCI)? (3) What are the seven habits of successful
interface designers? (7) Use the internet to find the ISO 9241-11 standard definition of usability
with respect to computer interfaces. (2) NB: The following is a self-assessment activity. Attempt
the question but do not submit the answer for marking. The solution will be made available
with the assignment feedback. The most used forms of output technology for business systems
are still in the form of screen displays and printed matter. List other current output types and
technologies currently available. [30 Marks] When drawing data flow diagrams (DFDs), use the
Gane and Sarson symbols/notation set. Draw, name and describe the four symbols used in a
data flow diagram (DFD). You may use a table to present your answer. (12) Briefly describe the
following with respect to DFDs: – Levelling (3) – Balancing (3) – Data dictionary (3) Draw a
diagram of an example of each of the following showing the process, and the input(s) and
output(s), where applicable. You should name each process, input or output used. Do not use
the examples from the prescribed textbook; rather, use them as guidelines. – Spontaneous
generation (3) – Black hole (3) – Gray hole (3) NB: The following are self-assessment activities.
Attempt the questions but do not submit them for marking. Solutions will appear in Tutorial
Letter 202. What are the six guidelines for drawing DFDs? Define Structured English and list its
guidelines. Draw the context diagram of the Order System provided in Figure 5-11 on page 155
of your prescribed book. Using this diagram, explain what the system does. In your explanation,
include what the Order System sends or receives from each of the external entities. Use the two
diagrams in Figure 5-12 on page 156 of the prescribed book to explain the difference and
similarities between a context diagram and diagram 0. Here we are interested in the general
differences or similarities between a context diagram and diagram 0; you can use Figure 5-12 as
the point of reference if you need to provide an example. [24 Marks] Scenario: The African
