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 use CAD to create and display 3-D models.

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

identify modelling work requirements and determine appropriate software functions and features

apply CAD functions to produce a rendered 3-D model to Australian Standard (AS) 1100.101–1992 Technical drawing – General principles.

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 using CAD to create and display 3-D models 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:

reading and interpreting engineering specifications

organising information

using computer and peripherals

using CAD program

saving 3-D modes in various file formats

preparing drawings in plane orthogonal, isometric projection or equivalent

Required knowledge

Required knowledge includes:

region modelling techniques

solid modelling techniques

development of sectioned models

use of cutting plane

use of cross hatching

use of pre-drawn library files and primitives to produce a 3-D model

use of third level software to produce 3-D models

how to extract mass and area properties

how to extract area properties from region models

application of basic rendering techniques to a 3-D model

Multiple viewing

Multiple viewing includes:

top views

front and side views

general 3-D view

3-D geometric shapes

3-D geometric shapes may include:

arcs and lines

spheres

cones

cylinders

boxes