ITECH7410 Software Engineering Methodologies

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ITECH7410 Software Engineering Methodologies
Assessment 2 Individual Analysis and Design of a control
This assessment provides students with the opportunity to deepen, extend and apply the
knowledge and skills developed from the first 3 weeks of material. Students complete the
assignment individually.
As described in this course’s third study guide – Software Analysis, Modelling and Specification –
there are two main approaches to systems analysis specification – structured (or classical analysis)
and object-oriented analysis. The reference text, Software Engineering: A Practitioners Approach
(Pressman, 2010) identifies these two paths as different approaches to requirements modelling.
There are special extensions to the structured approach to deal with real-time systems. Study guide
three identifies a real-time system as “…a system that has to respond to external events in a predefined maximum time interval. Hence such systems differ from the normal software system in that
their temporal performance forms part of their requirements”.
This assignment requires you to individually prepare parts of a requirements analysis specification
for an example of a real-time system. You will be required to complete Data Flow Diagrams (DFDs)
and include Real-Time Structured Analysis and Structured Design (RT-SASD) modifications and
components including Control Flow Diagram extensions (CFDs), where appropriate, Process
Specifications (PSPECs) and Control Specifications (CSPECs) (using combinational or sequential
Finite State Machines (FSMs) as required and presented in an appropriate format as Process
Activation Tables (PATs) and/or State Transition (Machine) Diagrams (STDs) or State Transition
Matrices (STT)).
Purpose, Learning Outcomes
The purpose of this assessment is to
• demonstrate that you can conduct a search of literature related to Software Engineering
Methodologies in order to investigate appropriate models and methodologies for a particular
• demonstrate that you can read the literature and understand how it is relevant to a particular
• begin to collect some reference material that will be useful for your final seminar at the end of
this course;
• begin to use the library and Endnote to keep records of your research and summarise articles
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• develop your skills, in particular, creating models and specifications of a system as a
mechanism for describing system requirements;
• provide students with the opportunity to apply the knowledge and skills developed from the
first three weeks of material;
• provide students with an opportunity to perform an analysis of a system.
The learning outcomes being directly assessed are:
S1. Critically analyse and use complex decision making to research and determine the appropriate
Software Engineering tools and methodologies to utilize for a given situation.
S2. Apply professional communication skills to support and manage the engineering of a large
software system.
S3. Review, critically analyse and develop artefacts to define processes for quality assurance, risk
management and communication in large software development projects.
S4. Implement quality assurance activities to verify user requirements and validate design
Application of knowledge and skills
A1. Analysis of a large system development problem to decide upon the best methodological
In this assignment, you are asked to create a requirements specification and analysis of part of a
system. The specification of the (sub) system should be a clear and unambiguous description of all the
requirements, so that it could be used to inform a subsequent design of that system. As part of the
software engineering methodology, it is important that requirements are clearly specified so that they
can be traced through to design, verification and validation activities. Ultimately, if the system is
specified clearly, quality assurance activities can be adopted to ensure that the correct system is being
In the book “Requirements Engineering for Software and Systems’ by Phillip A Laplante, 2011, CRC
Press, the appendix ( ) contains a brief Software Requirements Specification (SRS) for
a smart home. This book is available through the online oreilly books (accessed online through the
library). The smart home is discussed in various places within that text. You may NOT directly use
diagrams provided in that text in this assignment, however, you may find it useful to use those as
reference models to assist in your understanding of the analysis process.
References provided in the course lecture slides will also be useful for additional reading.
You are asked to select a particular control subsystem of an imagined smart campus system, to
conduct a real-time structured analysis upon. It is recommended that each student selects a different
subsystem to analyse. In the next assignment you will work in groups to produce some design
artefacts working with other students. That subsequent group assignment will build on the work
completed in this assignment.
As part of your analysis, you are required to create the following analysis artefacts to specify the
system requirements:
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1. Data Flow (DFD) and Control Flow Diagrams (CFD) using real-time extensions for
control flows to indicate control events/flows, providing PSPECS where appropriate.
These diagrams should be provided sufficient detail that only a single task is carried out
by each process at the lowest level. You should show the control events/flows and data
flows on the same diagrams. Use the real-time extensions for control flows etc. shown in
the lecture notes. You need to determine when and where events will occur. For
example, whenever a piece of data becomes available it may need a control event to let
the system know that it is available. These events must be clearly shown in these
DFD/CFD diagrams and then handled in the CSPEC.
2. Process specifications (PSPECs) – a pseudo-code or similar design language
specification is required for each process at the lowest level. A narrative description
alone will not be considered sufficient.
3. Control Specifications (CSPECs) – use combinational or sequential Finite State
Machines (FSMs) as required, presented in an appropriate format. The idea is that the
CSPEC will completely describe how a particular event or control flow is handled in the
system. You need to provide at least one “Process Activation Table” and “State
Machine Diagram” as appropriate. The Finite State Machine (FSM) is used to describe
events and states in the system. The Process Activation Table/State Transition Table or
State Transition Matrix should clearly demonstrate the valid transitions between states.
Submit a detailed technical document that could be considered to contribute to an SRS document. In
addition to the above, Your technical report should contain:
1. Scope statement outlining the purpose of this report
2. A complete description of the subsystem you are analysing describing the real time
functionality and user interaction with the system
3. Artefacts/models as describe above with supporting PSPECs and description explaining how
they contribute to the requirements analysis
Reasonable assumptions may be made about your system. These should be clearly stated in your
description of the subsystem.
This is an individual assignment and students must submit it in Moodle.
Timelines and expectations
Percentage value of this assessment: 20%
Minimum time expectation: 12 hours
This is an individual assignment and students must submit to Turnitin prior to submission
Due date and submission details are in the course description.
Please refer to the Course Description for information regarding late assignments, extensions, special
consideration, and plagiarism. You are reminded that all academic regulations can be accessed via the
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university’s website, see:
Additional support
Students are reminded that there are supports available regarding writing, researching and general
academic skills. Various sources of help are available at :, and .
Tutorial 1 activities provide some initial ideas regarding referencing, research and accessing journals
through the library. In addition, students should consult
and use FedCite ( ) to ensure they are
referencing correctly.
Students should write in an appropriate academic writing style. For more information, consult the
resources available at:
The following additional resources will assist you with this assignment:
• Concepts of Real Time Systems ( (This is
also the resource listed under that name in Week 3 of your Moodle shell)
• Week 3 study materials including readings, lecture notes and up to Section 3 of study guide
• Chapter 7 – Requirements Modeling: Flow, Behavior, Patterns, and WebApps – of Pressman
• Chapter 5 and 6 in Real-Time Systems Design and Analysis. Tools for the Practitioner 4th
edition (2012) Phillip A LaPlante, Seppo J Ovaska IEEE press,
• Hatley and Pirbhai Extensions from—Eight-Years-of-Lessons-Learned or
• Requirements Engineering for software and systems (2011) Philllip A Laplante CRC Press
Marking Criteria
Work will be assessed according to the details provided in the Marking Rubric on the following page.
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Marking Rubric
Name and No
Description of
A text-based description completely outlines the details of the
chosen sub system – processes involved, the triggering events
and the transitions between valid states in the system. This
description matches the subsequent analysis artefacts provided
Data Flow
A single process is displayed at the lowest level. Whenever data
becomes available it needs to be displayed and handled in the
CSPEC. All relevant processes are included and matches the
description provided completely.
Control Flow
Using real-time extensions for control flow to show when and
where data is available. All relevant control flows and processes
are included.
Pseudo-code (or similar design language) required for at least
one process at the lowest level – narrative alone is not sufficient.
Include ID.
CSPECSs should describe how a chosen event or control flow is
handled in the sub-system. At least one of Process Activation
Tables and State Machine Diagrams/Matrix are required.
Report style
Report is well written using professional language and adheres
to guidelines given for assignment and stated at
study/online-help-with/study-skills-and-writing-guides (Any
assumptions must be clearly stated and appropriate)
Total Mark
Course Mark

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