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Elements and Performance Criteria

1. Identify and Interpret formulae for process calculations
   • Required calculation method is identified to suit the application, including selection of relevant arithmetic operationsand/or formulae.
   • Units of measurement are identified and used correctly.
2. Interpret and present graphical representations of mathematical information
   • Information presented in mathematical symbols, graphs and charts is correctly interpreted.
   • Information is presented clearly using mathematical symbols, graphs and charts.
3. Perform calculations
   • Formulae are used correctly to perform calculations.
   • Use electronic calculators or spreadsheets to perform water industry calculations.

Required Skills

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

Evidence Required

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 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 andor 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 persons 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 RCCRPL 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 projectbased 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

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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. 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

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