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.
Oscillator construction types
Oscillating construction types may include:
roskoph
nickel
glycudur
chronometer
2, 3, 4 arms
bi-metal compensating
annular
balance spring (e.g. flat and overcoil)
tourbillion
Performance characteristics
Performance characteristics may include:
timing, certified chronometer
effects of temperature, shocks, magnetism and position of wear
temperature compensation
Record and document repair
Record and document repair may include:
extent and date of repair
cost of replacement part
time spent on procedure
Workshop tools and equipment
Workshop tools and equipment may include:
hand tools
levers (e.g. balance spring)
roller removing tool
staking set
watchmaker's lathe
balance wheel truing tool
poising tool
figure of eight calipers
spirit lamp
presto roller jewel fitting tool
Oscillator components
Oscillator components may include:
balance wheel
balance spring
balance staff
roller
roller jewel
Type of construction
Type of construction may include:
balance staff (e.g. friction fitted, riveted and screwed)
roller (e.g. single table, double table, incabloc and two piece)
roller jewel shape (e.g. D shape, triangular and ellipitical)
balance spring (e.g. flat, overcoil, helical, spherical and conical)
Wear and damage
Wear and damage may include:
balance staff pivots bent, scored or worn
balance wheel out of true, damaged or enlarged hole
roller tables deformed or damaged
roller jewel cracked, chipped or missing
balance spring centred flat, at the cock and collet
Appropriate repair process
Appropriate repair process may include:
consideration of component cost and availability
replace balance complete
replace balance staff
repair or replace balance spring
repair or replace roller
dismantling and reassembling techniques
inspections adjustments of components
lubrication techniques, type and quantity
use of stop oil treatments (e.g. Epilame and Fixodrop)
Type and method of balance staff removal and replacement
Type and method of balance staff removal and replacement may include:
friction fit
riveted
screwed
turning rivet/hub on lathe
knock out staking set (e.g platax tool)
grinding molfre tool
shock-resistance (e.g. incabloc)
Correct operation
Correct operation may include:
balance staff secure fitting/tightness
roller aligned and secure
balance wheel true
balance wheel static poised
balance spring stud location in-beat
balance spring adjusting
balance staff end shakes
Type of roller and roller jewel
Type of roller and roller jewel may include:
single table
double table
two piece
shock-resistance (e.g. incabloc)
D shaped, triangular or elliptical roller jewels
Shock protection devices
Shock protection devices may include:
operating principles
components (e.g. jewels, endstones, combined setting and shock spring)
types of construction (e.g. incabloc, Kif, Seiko, Citizen and Wyler)
Watch performance
Watch performance may include:
in-beat 0.5 ms
amplitude (e.g. minimum 220 - 270 degrees, variations in positional errors)
rate +/- 5 - 10 seconds a day

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
A person who demonstrates competency in this unit must be able to service, inspect and adjust mechanical watch oscillating systems, including balance staff replacement, to industry standards, manufacturer specifications and in accordance with safety regulations and procedures.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessors must be satisfied that the candidate can competently and consistently:
identify different types and grades of mechanical watch oscillating systems
diagnose faults in mechanical watch oscillating systems
inspect and repair faults in mechanical watch oscillating systems
repair a mechanical watch with broken or worn balance staff
inspect and adjust oscillator components for optimum performance.
Context of and specific resources for assessment
Assessment may occur on the job or in an appropriately simulated environment. Access is required to real or appropriately simulated situations, including work areas, materials and equipment, and information on workplace practices and OHS practices.
Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate ethnicity, age, gender, demographics and disability.
Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.
Method of assessment
Assessment must satisfy the endorsed Assessment Guidelines of the MEM05 Metal and Engineering Training Package.
Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with application of underpinning knowledge.
Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure its correct interpretation and application.
Assessment may be applied under project-related conditions (real or simulated) and require evidence of process.
Assessment must confirm a reasonable inference that competency is not only able to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.
Assessment may be in conjunction with assessment of other units of competency where required.
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.