Elements and Performance Criteria

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.
Causes of loss of steam plant efficiency may include:
Conduction-heat loss (such as fouled tubes)
High flue-gas temperature
Low combustion-air supply temperature
Low feed-water supply temperature
Low quality fuel
Operation at low or cyclic loads
Poor:
combustion
controls/instrumentation
water treatment
Radiant-heat loss
Too much excess air (i.e. high oxygen [O2])
Boilers and steam plant may include:
Condensers
Economiser
Feed pumps
Fired
High pressure
Low pressure
Medium pressure
Steam - steam generators
Unfired
Failures may include:
Acid dew point corrosion
Caustic gouging
Corrosion fatigue
Distortion
Erosion
Fatigue
Hydrogen damage
Maintenance damage
Material flaws
Over temperature
Pitting
Stress:
corrosion cracking
rupture
Thermal fatigue
Vibration
Welding flaws
Constraints may include:
Class requirements
Location
Reliability
Time
Type of materials
Safety valves may include:
Boiler drim
Economiser
Superheater
WHU

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, the required skills and knowledge, the range statement and the Assessment Guidelines for the Training Package.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the Elements, Performance Criteria, Required Skills, Required Knowledge and include:
providing accurate and reliable information
providing appropriate level of detail in responses
performing accurate and reliable calculations.
Context of and specific resources for assessment
Performance is demonstrated consistently over time and in a suitable range of contexts.
Resources for assessment include access to:
industry-approved marine operations site where advanced knowledge of marine auxiliary boilers can be demonstrated
diagrams, specifications and other information required for performing advanced calculations related to marine auxiliary boilers
technical reference library with current publications on marine auxiliary boilers and steam plant
tools, equipment and personal protective equipment currently used in industry
relevant regulatory and equipment documentation that impacts on work activities
range of relevant exercises, case studies and/or other simulated practical and knowledge assessments
appropriate range of relevant operational situations in the workplace.
In both real and simulated environments, access is required to:
relevant and appropriate materials and equipment
applicable documentation including workplace procedures, regulations, codes of practice and operation manuals.
Method of assessment
Practical assessment must occur in an:
appropriately simulated workplace environment and/or
appropriate range of situations in the workplace.
A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate to this unit:
direct observation of the candidate demonstrating advanced knowledge of marine auxiliary boilers
direct observation of the candidate applying relevant WHS/OHS requirements and work practices.
Guidance information for assessment
Holistic assessment with other units relevant to the industry sector, workplace and job role is recommended.
In all cases where practical assessment is used it should be combined with targeted questioning to assess Required Knowledge.
Assessment processes and techniques must be appropriate to the language and literacy requirements of the work being performed and the capacity of the candidate.