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 apply surface modelling techniques to 3-D models 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 apply surface modelling techniques 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 CAD 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 and manipulating surfaces in 3-D space

saving drawing files in the appropriate format

extracting the physical properties of shapes and surfaces created in 3-D space

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

applying rendering techniques to a 3-D model

using various materials and surface finish options

Required knowledge

Required knowledge includes:

purpose for which the model is to be used

principle tools used in the creation and manipulation of model surfaces

terminology associated with surface modelling

features and uses of geometric, freeform and derived surfaces

features and uses of wire frame and surface modelling techniques

surface types

features and uses of rendering techniques

features and uses of materials and surface finishing options

number of views required

CAD software features

procedures for creating ruled and revolved surfaces in 3-D space

applications of ruled and revolved surfaces

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

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 and surfaces created in 3-D space

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

safe work practices and procedures

terminology associated with surface modelling

Wire frame modelling techniques

Wire frame modelling techniques may include:

setting and using work planes

shifting and working with coordinate system

moving through 3-D space

changing ‘Z’ depth

construction techniques

wire frame editing

Surface modelling techniques

Surface modelling techniques may include:

definition and use of surface primitives

box, cylinder, cone, torus, wedge and editing surface primitives

Surface types

Surface types may include:

geometric, freeform and derived surfaces

draft, revolved, ruled, lofted, swept, coons, offset trimmed, fillet, blend, parametric and Non-Uniform Rational B-Spline (NURBS) surfaces

surface normals and reversing

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