The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, 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 candidateshould demonstrate the ability to:

select appropriate mathematical processes for workplace tasks

select and use appropriate electronic aids including calculators or computers

carry out calculations

estimate answers

interpret graphical representations of mathematical information

Context of and specific resources for assessment

Access to the workplace and resources including:

documentation that should normally be available in a water industry organisation

relevant codes, standards, and government regulations.

Where applicable, physical resources should include equipment modified for people with disabilities.

Access must be provided to appropriate learning and/or assessment support when required.

Assessment processes and techniques must be culturally appropriate, and appropriate to the language and literacy capacity of the candidate and the work being performed.

Validity and sufficiency of evidence requires that:

competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace

where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice

a decision of competence only taken at the point when the assessor has complete confidence in the person’s competence over time and in various contexts

all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence

where assessment is for the purpose of recognition (RCC/RPL), the evidence provided will need to be authenticated and show that it represents competency demonstrated over a period of time

assessment can be through simulated project-based activity and must include evidence relating to each of the elements in this unit.

In all cases where practical assessment is used it will be combined with targeted questioning to assess the underpinning knowledge. Questioning will be undertaken in a manner appropriate to the skill levels of the operator, any cultural issues that may affect responses to the questions, and reflecting the requirements of the competency and the work being performed.

For consistency of assessment

Evidence must be gathered over time in a range of contexts to ensure the person can achieve the unit outcome and apply the competency in different situations or environments

This describes the essential skills and knowledge and their level, required for this unit.

Required skills:

perform calculations using the basic arithmetic operations - addition, subtraction, multiplication and division

use electronic calculators or spreadsheets to perform calculations

select and use the appropriate formulae for a given application

check calculated answer for accuracy

estimate answers

produce simple charts or graphs from given information or observations made

interpret graphical information

Required knowledge:

basic arithmetic operations

BODMAS principle – order of operation

metric units and conversions

percentages

ratio and proportions

averages

decimals and fractions

rounding off and estimations

reasons for ensuring that the units of each term are consistent with the formulae selected

techniques for estimating approximate answers

graphical representation of data

procedures for drawing "lines of best fit"

trends indicated by graphs or charts drawn including upper and lower limits

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. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs if the candidate, accessibility of the item, and local industry and regional contexts.

Arithmetic operations may include:

addition, subtraction, multiplication and division

manipulation of decimals, fractions and mixed numbers

percentages

proportions and ratios

Units of measurement may include:

time - second

length -metre

mass – kilogram

volume – cubic metre

pressure - Pascal

Calculations may include:

areas and volumes

perimeter and circumference

detention time

flow rate

loading rates

chemical dosages

laboratory results

Graphs and charts may include:

bar and line graphs

multi parameter graphs

pie charts

control charts