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

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

Interpret work order and locate and apply relevant information.

Apply safety requirements including the isolation of equipment and the use of personal protective equipment.

Follow work instructions, operating procedures and inspection processes to:

minimise the risk of injury to self and others

prevent damage and wastage of goods, equipment and products

maintain required production output and product quality.

Diagnose gas fuel system faults, including one fault from each category listed below:

poor engine performance

increased emission levels

impact of a prior system modification

incorrect installation of the gas system

caused by an influence from an external system.

Accurately record and report the diagnostic process and findings and recommended rectification.

Work effectively with others.

Modify activities to cater for variations in workplace context and environment.

Context of, and specific resources for assessment

Assessment may occur on the job or in a workplace simulated facility with relevant process equipment, material, work instructions and deadlines.

Access to a realistic requirement and objectives for analysis and evaluation, operational gas fuel systems with real or simulated faults, monitoring processes and testing equipment appropriate to the objectives, research facilities and technical information and a realistic work environment.

Method of assessment

Assessment of this competency is most likely to be project related under real or simulated conditions and require portfolios or other forms of indirect evidence of process. Direct evidence may include certification of compliance of the final outcome/product or authorisation for use by a competent authority.

Assessment must confirm the inference that competency is able not only to be satisfied under the particular circumstances, but is able to be transferred to other circumstances.

Competence in this unit may be assessed in conjunction with other functional units which together form part of the holistic work role

Guidance information for assessment

Required skills

research, organise and understand technical information related to contemporary gas fuel systems, monitoring and testing processes, diagnostic methods and options and safety procedures.

communicate ideas and information to enable confirmation of work requirements and specifications, coordination of work with site supervisor, other workers and customers, the reporting of work outcomes and the completion of regulatory, commercial and vehicle information systems inputs.

plan and organise activities including the planning of analytical processes, the establishment of evaluative (success) criteria, the preparation and layout of the worksite and the obtaining of testing equipment and material to avoid any backtracking, workflow interruptions or wastage.

work with others and in a team by recognising dependencies and using cooperative approaches to optimise workflow and productivity.

use mathematical ideas and techniques to complete measurements, calculate analytical requirements, calibrate and establish testing equipment and present analytical results.

establish analytical processes, including diagnostic processes, which anticipate and allow for risks, cater for both direct and indirect evidence, avoid or minimise reworking and avoid wastage.

use the workplace technology related to systems analysis and diagnosis, information research and management systems, testing equipment, maintenance equipment, tools, calculators and measuring devices.

Required knowledge

mechanical theory covering the concepts and principles of mechanical, hydraulic and pneumatic systems.

general knowledge of the concepts, principles and processes involved in planning and implementing systems analysis and evaluation.

general knowledge of the theory of diagnosis including concept, design and planning.

detailed knowledge of the concepts, types, functions, operations and limitations of gas fuel systems.

detailed knowledge of the types, functions, operations and limitations of diagnostic testing equipment.

general knowledge of the methods and processes for recording and reporting diagnostic findings and recommendations.

general knowledge of personal computer operation.

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.

Failure analysis and evaluation process

The objective of the failure analysis and evaluation process may be to determine fault rectification measures, to effect variation in system characteristics and parameters or to enhance system performance.

System faults

Gas fuel system faults covered by this unit are to include direct failures in safety systems, electrical systems, fuel delivery system, sequential vapour injection, fuel container, calibration and adjustment specifications, component specifications, component assembly and system modifications.

System failures

Gas fuel system failures covered by this unit are to include indirect faults caused by the influence of external systems which may or may not be faulty in their primary operations.

Unit context

Work is carried out in accordance with legislative obligations, Australian Design Rules, environmental legislation, relevant health regulations, manual handling procedures and organisation insurance requirements.

OH&S

OH&S requirements, vehicle industry regulations, safety management systems, hazardous substances and dangerous goods code and safe operating procedures.

Evaluative criteria

Evaluative criteria, sometimes referred to as success factors, detail the criteria against which the achievement of the objectives of the analysis are judged. They are to include statistically based criteria and may include other measures.

Isolation procedures

Equipment isolation procedures are to regulatory, industry and enterprise standards.

Testing equipment

Testing equipment is to include multimeters, data scanners, test lights, pressure/vacuum gauges, water and mercury manometers, electronic leak detectors, engine tune oscilloscopes, four-gas engine analyser and exhaust pressure gauge, and may include other manufacturer testing equipment.

Tests

Tests to be conducted are to include liquid and vapour pressure, leakage, operation of all safety components and systems, electrical control systems, exhaust emissions, engine performance, gas system performance and data interpretation and readings related to direct, indirect and intermittent causes.

Personal protective equipment

Personal protective equipment is to include that prescribed under legislation, regulations and enterprise policies and practices.

Information and procedures

Workplace procedures relating to the use of tools and equipment.

Workplace procedures relating to reporting and communication.

Manufacturer/component supplier specifications and application procedures for testing equipment and material.

Manufacturer/component supplier specifications, schematics and operational procedures related to stability/steering and suspension systems.

Australian Design Rules.

Gas fuel system regulations.

Vehicle industry publications related to emerging gas fuel system technology and technology changes.