Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.
Required skills
critical thinking and analytical skills to investigate other methods of making spheres and beads where commercial equipment isn’t available
planning and organising skills to organise required materials
problem-solving skills to deal with contingencies
numeracy skills to use numerical features of machinery
technical skills to:
use appropriate machinery and equipment
select appropriate material for beads and spheres.
Required knowledge
suitability of rough for production of beads and spheres, taking into account the level of wastage and cost
equipment and consumables needed for the process
industry standards for opal beads and spheres
OHS issues related to machinery.
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.
Bead mill, sphere making equipment and drills may include: | Arrowhead Gemcraft (USA) Sphere Machine E & J Adams Lapidary (USA) Sphere Machine home-made equipment Mahashi (Japan) Bead Mill Richardson’s (USA) Sphere Machine. |
Maintenance areas may include: | bead mill: all bearings all electrics bead holders and wear factor bottom rotating disc and wear factor rubber pad on top rotating disc sphere makers: all electrics assorted sphere cups polishing pads reduction boxes. |
Materials suitable for making spheres and beads may include: | any opal material, taking into account a yield factor or recovery rate of only 10% to 15% from a given ounce of rough opal beads of a variety of regular or free form shapes spheres cut from any opal material, with consideration of yield factor. |
Grinding mediums may include: | diamond powder #80 through to #1200 silicon carbide grit #80 through to #1200. |
Polishing mediums may include: | cerium or tin oxide diamond powder #3000 through to #100,000. |
Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.
Observation Checklist