Application
This unit describes the skills and knowledge required to produce an object-oriented design from specifications, applying the cyclic process of iteration from identification of class, instance, role and type to the final object-oriented model of the application.
It applies to system designers who are required to design systems using an object-oriented method.
No licensing, legislative or certification requirements apply to this unit at the time of publication.
Elements and Performance Criteria
ELEMENT | PERFORMANCE CRITERIA |
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1. Derive high-level design from specification | 1.1 Develop static class diagram from given set of specifications 1.2 Develop either collaboration diagram or sequence diagram from given set of specifications 1.3 Develop either activity diagram or state diagram from given set of specifications |
2. Refine design | 2.1 Investigate and refine behaviour, state of classes and collaboration between classes 2.2 Validate correct visibility of class services and state data 2.3 Identify generalisations within classes 2.4 Identify specialisations within classes 2.5 Apply principles of aggregation and composition to refine class design |
3. Document design | 3.1 Create detailed uniform modelling language (UML) static class diagrams 3.2 Create detailed UML collaboration or sequence diagrams 3.3 Create detailed UML activity or state diagrams |
Evidence of Performance
Evidence of the ability to:
produce an object-oriented design from requirements, documents or system specifications, including:
static class diagrams
collaboration or sequence diagrams
activity or state diagrams
refine the design
document the design.
Note: If a specific volume or frequency is not stated, then evidence must be provided at least once.
Evidence of Knowledge
To complete the unit requirements safely and effectively, the individual must:
explain design quality metrics such as coupling and cohesion
explain design refinement techniques
describe programming design principles
describe different programming methodologies
outline various developmental life cycle options.
Assessment Conditions
Gather evidence to demonstrate consistent performance in conditions that are safe and replicate the workplace. Noise levels, production flow, interruptions and time variances must be typical of those experienced in the programming and software development field of work and include access to:
system specifications
requirement documents
design specifications
detailed design.
Assessors must satisfy NVR/AQTF assessor requirements.
Foundation Skills
This section describes language, literacy, numeracy and employment skills incorporated in the performance criteria that are required for competent performance.
Skill | Performance Criteria | Description |
Reading | 1.1, 1.2, 1.3 | Interprets and critically analyses and applies appropriate strategies to construct meaning from specifications |
Writing | 1.1-1.3, 3.1-3.3 | Communicates complex relationships between ideas and information, matching style of writing and diagrams to purpose and audience |
Get the work done | 1.1, 1.2, 1.3, 2.1-2.5, 3.1-3.3 | Uses systematic, analytical processes in complex, non-routine situations, setting goals, gathering relevant information, and identifying and evaluating options against agreed criteria when refining the design Uses analytical processes to decide on a course of action, establishing criteria for deciding between options Understands key principles and concepts underpinning the design and operation of digital systems and tools |
Sectors
Programming and software development