Use 3D CAD in engineering


This unit describes the performance outcomes, skills and knowledge required to use 3D modeling commands in a standard CAD software package to produce various types of 3D models, and use the software to produce standard and non-standard orthogonal, isometric and pictorial views from the 3D models.

The unit of competency is applied by drafting personnel in a civil and structural engineering environment operating as part of an engineering design team.

No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.

  • DCSBCE602 Use basic CAD in engineering
  • DCSGRE603 Use graphics in engineering


Elements describe the essential outcomes.


Performance criteria describe the performance needed to demonstrate achievement of the element.

1.    Prepare a three-dimensional environment in CAD.

1.1.      Set up a three-dimensional environment with top, front, side, and general 3D views.

1.2.      Draw elements on any plane of the three-dimensional space.

1.3.      Relocate a coordinate system to suit drawing geometry and facilitate a drawing process.

2.    Create a wire frame model.

2.1.      Create a wire frame model by drawing elements in three-dimensional space using basic CAD commands such as lines and polygons.

2.2.      Hatch and dimension areas in the three-dimensional space.

3.    Create a solid and surface model.

3.1.      Build solid models using the full functions of solid modelling.

3.2.      Create surface model objects in three-dimensional space.

3.3.      Mesh areas defined with simple 2D commands

4.    Display visual styles.

4.1.      Print a site plan from distance and offset measurements along a base line.

4.2.      Display models with rendered faces.

4.3.      Apply materials to solid models.

4.4.      Apply and manipulate lighting effects to solid models

5.    Create standard and non-standard orthogonal views from solid or surface objects.

5.1.      Create standard two-dimensional multi-views from solid or surface model objects.

5.2.      Dimension views according to AS 1100.

5.3.      Create non-standard multi-views and isometric views

5.4.      Create pictorial views with different visual styles


Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.


41984 – Use 3D CAD in Engineering is equivalent



Assessment requirements for DCSCAE627 Use 3D CAD in engineering


To achieve competency in this unit a person must satisfy the requirements of the elements and performance criteria, foundation skills and range of conditions included in the unit.

The person must also:

  • create and manage a wire frame object.
  • use Boolean operators with solid model objects.
  • make revisions by editing the surface model objects.
  • apply visual styles as needed.
  • create standard and non-standard two-dimensional multi-views to AS 1100.
  • create isometric and pictorial views of a solid or surface model object.

Note: If a specific volume or frequency is not stated, then evidence must be provided at least once for each criterion.


To achieve competency in this unit, a person must demonstrate knowledge of:

  • procedures for setting up a three-dimensional environment.
  • processes for creation of wire frames, solid and surface virtual model objects.
  • use of Boolean operators in solid modeling.
  • editing features in CAD software.
  • methodology for displaying models that exhibit:
    • removal of hidden lines.
    • rendered surfaces.
    • application of materials.
    • lighting effects.
  • procedures for dimensioning multi-views


Assessment conditions:

All assessment must be completed in accordance with work health and safety standards.

When assessments are conducted remotely, invigilation software must be used to ensure authenticity of work completed.

Model answers or marking guides must be provided for all assessments to ensure reliability of assessment judgements when marking is undertaken by different assessors.

The candidate must have access to all tools, equipment, materials and documentation required.

Assessor Requirements:

Assessors must satisfy the assessor requirements in the standards for registered training organisation (RTOs) current at the time of assessment.

Assessors must also hold a tertiary qualification in engineering or related field.

Assessors must have worked for at least 3 years in industry where they have applied the skills and knowledge covered in this unit of competency.

The RTO must also ensure that trainers and assessors keep their industry knowledge up to date through ongoing professional development.

The RTO must take appropriate steps, as an ongoing procedure, to verify information about trainer and assessor’s qualifications, vocational competencies and current industry skills


Software/Hardware Used


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