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Elements and Performance Criteria

1. Derive the high-level design from specification
   • Develop a static class diagram from a given set of specifications
   • Develop either a collaboration diagram or a sequence diagram from a given set of specifications
   • Develop either an activity diagram or a state diagram from a given set of specifications
2. Refine the design
   • Investigate and refine behaviour, state of classes and the collaboration between classes
   • Validate the correct visibility of class services and state data
   • Identify generalisations within classes
   • Identify specialisations within classes
   • Apply the principles of aggregation and composition to refine class design
3. Document the design
   • Create detailed uniform modelling language (UML) static class diagrams
   • Create detailed UML collaboration or sequence diagrams
   • Create detailed UML activity or state diagrams

Required Skills

Required skills

communication skills to liaise with clients and staff

technical skills to

abstract classes related to producing the required design

conduct completion of abstractions to successfully produce the required design

conduct domain analysis to successfully produce the required design

conduct refinement of inheritance hierarchies to successfully produce the required design

Required knowledge

design quality metrics such as coupling and cohesion

design refinement techniques

programming design principles

different programming methodologies

various developmental life cycle options

Evidence Required

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria required skills and knowledge range statement and the Assessment Guidelines for the Training Package

Overview of assessment
Critical aspects for assessment and evidence required to demonstrate competency in this unit	Evidence of the ability to produce an objectoriented design from requirements documents or system specifications including static class diagrams collaboration or sequence diagrams activity or state diagrams
Context of and specific resources for assessment	Assessment must ensure access to system specifications requirement documents design specifications detailed design appropriate learning and assessment support when required modified equipment for people with special needs
Method of assessment	A range of assessment methods should be used to assess practical skills and knowledge The following examples are appropriate for this unit direct observation of candidate performing the process of iteration from identification of class instance role and type to the objectoriented model verbal or written questioning to assess candidates knowledge of objectoriented techniques and analytical skills including evaluating development methodologies to a project or scenario to the scope and tasks involved in the objectoriented design processes review of documentation as required by the chosen methodology
Guidance information for assessment	Holistic assessment with other units relevant to the industry sector workplace and job role is recommended where appropriate Assessment processes and techniques must be culturally appropriate and suitable to the communication skill level language literacy and numeracy capacity of the candidate and the work being performed Indigenous people and other people from a nonEnglish speaking background may need additional support In cases where practical assessment is used it should be combined with targeted questioning to assess required knowledge

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Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Specifications may include:

specifications of a system or process application that includes use-case diagrams requirements document.

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