Elements and Performance Criteria

RANGE STATEMENT
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
All operations are performed in accordance with standard procedures. Procedures may be written, verbal, computer-based or in some other form. They include:
all work instructions
standard operating procedures
formulas/recipes
batch sheets
temporary instructions
any similar instructions provided for the smooth running of the plant
For the purposes of this Training Package, 'procedures' also includes good operating practice as may be defined by industry codes of practice (e.g. Responsible Care) and government regulations
Joule-Thomson device
A Joule-Thomson device is any device which requires a gas/vapour to do work, typically by expanding, so cooling the vapour (i.e. uses the Joule-Thomson effect). While the vapour will not usually condense in the Joule-Thomson device it will often condense immediately on leaving the device. Some devices may be constructed to allow for condensation to occur within the device, this is sometimes also called the Joule-Kelvin effect
Hazards
Hazards include:
process hazards
cryogenic materials
cryogenic hazards
cold embrittlement
other hazards
Product produced
Product produced will typically be monitored for:
value of critical variables
state (liquid/vapour)
production rate (e.g. volume or mass flow rate)
other properties
Critical variables
Critical variables will typically include:
temperature
pressure
pressure drops
purity/contaminants
and may include:
inlet guide vane (IGV) blade angles
speed of rotation
other variables
Support units
Support units include:
lubricating oil
dry gas seals
other seals
other units
Ancillary equipment
This unit also covers ancillary equipment which forms part of the Joule-Thomson system
Appropriate action
Appropriate action includes:
recognising actual and potential problems
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
Start up/shut down as required
Start up/shut down as required includes:
start up and shut down to/from normal operating conditions
start up and shut down to/from isolated, cold and empty
all other conditions experienced on the plant (i.e. from any condition to any condition experienced on the plant)
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

EVIDENCE GUIDE
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
It is essential that the equipment be understood and that the importance of critical properties, settings and readings is known. Competence must be demonstrated in the operation of all ancillary equipment to the level required for this unit of competency.
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:
hazards are identified and controlled
product properties are kept within limits
quality is monitored to minimise wastage
process measurements/observations are continually made
all HSE requirements are followed
problems are anticipated and appropriate action is taken (i.e. problem fixed or reported).

Context of and specific resources for assessment
Assessment of this unit should include demonstrated competence on actual plant and equipment in a work environment. The unit will be assessed in as holistic a manner as is practical and may be integrated with the assessment of other relevant units of competency. Assessment will occur over a range of situations, which will include disruptions to normal, smooth operation.

Simulation may be required to allow for assessment of parts of this unit. Simulation should be based on the actual plant and include walk-throughs of the relevant competency components. Simulations may also include the use of case studies/scenarios, role plays and 3D virtual reality interactive systems. In the case of evacuation training or training for competencies practised in life-threatening situations, simulation may be used for the bulk of the training.

A bank of scenarios/case studies/what-ifs and questions will be required to probe the reasoning behind observable actions.

Method of assessment
In all plants it may be appropriate to assess this unit concurrently with relevant teamwork and communication units.
Individual enterprises may choose to add prerequisites and co-requisites relevant to their processes.

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.