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.

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

It is essential that the process and equipment be understood and that the importance of critical material properties, settings and readings is known. Competence must be demonstrated in the ability to recognise and analyse potential situations requiring action and then in implementing appropriate corrective action.

Consistent performance should be demonstrated. In particular look to see that:

all reasonably available joining techniques and materials were considered

appropriate techniques and materials have been selected

the reasons for choosing the technique and materials are sound

the product meets its required performance.

Competence must be demonstrated in the operation of all ancillary equipment to the level required for this unit of competency.

Context of and specific resources for assessment

Assessment will require the selection of joining methods, justifying the selection made and making a number of joints using both mechanical and adhesive joining techniques.

Assessment will occur over a range of situations which will include disruptions to normal, smooth operation.

Method of assessment

A single assessment event is not appropriate. On-the-job assessment should be included as part of the assessment process wherever possible. Where assessment occurs off the job, judgement must consider evidence of the candidate's performance in a productive work environment that includes a sufficient range of appropriate tasks and materials to cover the scope of application for this unit.

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.

Guidance information for assessment

Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.

Required skills

Required skills include:

preparing surfaces

using hand and power tools

applying assembly techniques

applying bonding techniques

applying joiner

Required knowledge

Required knowledge includes:

adhesives (e.g. plexus – methylmethacrylate)

sealants (e.g. sikaflex – silicon or butyl mastic)

mechanical joining

substrates and interactions with joiner

surface preparation of substrate

application methods

clamping forces (minimum and maximum)

adhesive/sealant thickness

primers

design rules around fastening (e.g. minimum area for pop rivets, rivet spacing and rivet patterns)

edge finish of pilot holes

quality requirements with the hole preparation

quality requirements with the installation of fasteners

radius of edge of laminate

effect of flatness and smoothness of joining surfaces

substrate composition in joining area

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.

Procedures

Procedures may be written, verbal, computer-based or in some other form, and may include:

all work instructions

standard operating procedures

formulas/recipes

batch sheets

temporary instructions

any similar instructions provided for the smooth running of the plant

good operating practice as may be defined by industry codes of practice (e.g. Responsible Care) and government regulations

Joining system

Joining system includes techniques and materials, such as:

bonding (e.g. adhesive, gluing, ethacrylates, sikaflex and epoxy)

using composite materials (e.g. Probond, Divelett, K-Lite and Eurmere)

secondary bonding – cured composite to cured composite

using mechanical fasteners (e.g. bolts and rivets)

Finished application properties

Finished application properties include:

permanent/removable

waterproof/chemical resistant

structural rigidity

strength (tensile, compressive, shear and torsional)

aesthetic

Properties of surfaces to be joined

Properties of surfaces to be joined include:

materials of construction

physical properties (e.g. strength and rigidity)

surface properties (e.g. surface finish and surface treatment/coatings)

size and shape

Preparation of surfaces

Preparation of surfaces to be joined may include:

solvent or other chemical cleaning

chemical etching

mechanical preparation such as blasting, buffing

surface smoothing (e.g. machining)

making of holes or other physical locking features

Most appropriate joining system

Most appropriate system refers to that system which has:

compliance with product requirements

greatest ease of joining

best financial return

greatest sustainability contribution

Sustainability

Sustainability incorporates the three aspects of:

survival of the ecology/physical environment – which means that an enterprise needs to manage the impact of the business to ensure the survival of the physical environment

economic viability – efficiency, cost and waste reduction and competitiveness to support survival of the business

social sustainability – an enterprise needs to manage the impact of the business to ensure its continued survival within the community and the survival of the community, including occupational health and safety (OHS)

Logs and reports

Logs and reports may include:

paper or electronic based

verbal reports

items found which require action

Appropriate action

Appropriate action includes:

determining problems needing action

determining possible fault causes

rectifying problem using appropriate solution within area of responsibility

following through items initiated until final resolution has occurred

reporting problems outside area of responsibility to designated person

Typical problems

Typical problems may include:

incompatible requirements

hazardous materials/preparation methods

non-uniform join

Health, safety and environment (HSE)

All operations to which this unit applies are subject to stringent HSE requirements, which may be imposed through state/territory or federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between Performance Criteria and HSE requirements, the HSE requirements take precedence