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

A person who demonstrates competency in this unit must be able to create 3-D model assemblies using CAD systems.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.

Specifically the candidate must be able to:

work within typical site/teamwork structures and methods

apply worksite communication procedures

comply with organisational policies and procedures, including quality requirements

participate in work meetings

comply with quality requirements

use industry terminology

apply appropriate safety procedures

select and use 3-D CAD software to create solid model assemblies that meet design specifications.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with creating 3-D models using computer aided design systems or other units requiring the exercise of the skills and knowledge covered by this unit.

Method of assessment

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways, including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Required skills

Required skills include:

obtaining relevant job instructions and specifications

creating the appropriate entities in 3-D space

manipulating the entities in 3-D space

modifying, where appropriate, existing 3-D models

saving drawing files in the appropriate format

extracting the physical properties of shapes created in 3-D space from the drawing file to meet job requirements

reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents

checking and clarifying task-related information

checking for conformance to specifications

undertaking numerical operations, geometry and calculations/formulae within the scope of this unit

creating intelligent models using parametric modelling

using pre-drawn library files to produce assemblies

extracting mass and area properties from solid model

applying rendering techniques to a 3-D model

using various materials and surface finish options.

producing hard copies of 3-D solid models

saving 3-D models in various file formats for retrieval into other CAD application software

Required knowledge

Required knowledge includes:

purpose for which the 3-D assembly model is to be developed

principle tools used in the creation and manipulation of assembly models

appropriate coordinate system for the job

reasons for selecting the chosen coordinate system

orientation of the model with respect to the coordinate system

number of views required to establish the model

top down and bottom up modelling techniques

procedures for creating entities and components in 3-D space

the entities that can be created/manipulated in 3-D space

procedures for manipulating entities in 3-D space

rendering types and preferences, render lighting techniques, views and scenes

procedures for modifying existing 3-D assembly models

procedures for saving drawing files

the various formats in which drawing files can be saved

reasons for using different formats when saving drawing files

procedures for extracting data with respect to the physical properties of shapes created in 3-D space

the physical properties of shapes created in 3-D space that can be extracted from the drawing file

hazard and control measures associated with using CAD system, including housekeeping

safe work practices and procedures

terminology associated with solid assembly modelling

Solid modelling assembly task

Solid modelling assembly task may include:

economic impact of design upon manufacturing

principles of design

engineering components and standard parts

edit solid models and assemblies

2-D manufacturing drawings and annotation

3-D printing of components and assemblies

rendering and use of colour on 3-D models and assemblies

production of hard copies of drawings for solid models, assemblies and orthogonal drawings

saving files for later retrieval

consolidation (e.g. project work)

parametric modelling

composite models

section models

library files and 3-D primitives

other relevant software packages for the production of 3-D models

3-D printing of components and assemblies

Rendering techniques

Rendering techniques may include:

rendering types and preferences

render lighting techniques

views and scenes

Appropriate personnel

Appropriate personnel may include:

supervisor

leading hand

foreman

manager

site engineer

trainer

mentor

teacher

team member

OHS requirements

OHS requirements may include:

legislation

personal protective equipment

material safety management systems

hazardous substances and dangerous goods code

awards provisions

safe work practices

Environmental requirements

Environmental requirements may refer to:

liquid waste

solid waste

gas, fume, vapour, and smoke emissions, including fugitive emissions

excessive energy and water use

excessive noise

Resource requirements

Resource requirements may include:

computer software

stationary

software reference documentation

reference texts

consumables

computer

printing equipment