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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

  1. Review process data

Required Skills

Required skills

Required skills include

identifying and defining six sigma projects

developing procedures for collection and analysis of data

reporting and presenting data and quantitative information

analysing priorities and improvement projects and determining where individual or team effort is required

determining and completing appropriate charts for a project

communicating and explaining DMAIC methods to others

leading a six sigma project team

documenting and reporting six sigma project benefits in both statistical defect reduction and benefitcost terms

Required knowledge

Required knowledge includes

charting including

Pareto charts

fishbone diagrams

PICK charts

run charts

scatter diagrams

statistical principles and analysis including

confidence limits

analysis of variance

presentation data

frequency distribution tables


measures of central tendency

arithmetic mean



measures of dispersion

standard deviation


interquartile range

correlation and dependence

acceptance criteriaconfidence levels

DMAIC methods

failure mode and effects analysis FMEA

process mapping

suppliers inputs process outputs customers SIPOC mapping

types of data eg discretecontinuousattributes and their use in six sigma

Evidence Required

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

Critical aspects for assessment and evidence required to demonstrate competency in this unit

A person who demonstrates competency in this unit must be able to provide evidence of the ability to

analyse statistical data and identify significant variations and other indicators for potential six sigma projects

apply DMAIC process individually

lead others in DMAIC process

review control strategies

confirm improvements

Context of and specific resources for assessment

Assessment of performance must be undertaken in a workplace using or implementing one or more competitive systems and practices

Access may be required to

workplace procedures and plans relevant to work area

specifications and documentation relating to planned currently being implemented or implemented changes to work processes and procedures relevant to the assessee

documentation and information in relation to production waste overheads and hazard controlmanagement

reports from supervisorsmanagers

case studies and scenarios to assess responses to contingencies

Method of assessment

A holistic approach should be taken to the assessment

Competence in this unit may be assessed by using a combination of the following to generate evidence

demonstration in the workplace

workplace projects

suitable simulation

case studiesscenarios particularly for assessment of contingencies improvement scenarios and so on

targeted questioning

reports from supervisors peers and colleagues thirdparty reports

portfolio of evidence

In all cases it is expected that practical assessment will be combined with targeted questioning to assess underpinning knowledge

Where applicable reasonable adjustment must be made to work environments and training situations to accommodate ethnicity age gender demographics and disability

Guidance information for assessment

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

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.

Competitive systems and practices

Competitive systems and practices may include, but are not limited to:

lean operations

agile operations

preventative and predictive maintenance approaches

monitoring and data gathering systems, such as Systems Control and Data Acquisition (SCADA) software, Enterprise Resource Planning (ERP) systems, Materials Resource Planning (MRP) and proprietary systems

statistical process control systems, including six sigma and three sigma

Just in Time (JIT), kanban and other pull-related operations control systems

supply, value, and demand chain monitoring and analysis


continuous improvement (kaizen)

breakthrough improvement (kaizen blitz)

cause/effect diagrams

overall equipment effectiveness (OEE)

takt time

process mapping

problem solving

run charts

standard procedures

current reality tree

Competitive systems and practices should be interpreted so as to take into account:

the stage of implementation of competitive systems and practices

the size of the enterprise

the work organisation, culture, regulatory environment and the industry sector


DMAIC is a structured improvement methodology for existing business processes involving the following stages:





control and standardise


Definition of the project to include:

completed, verified and validated as in process map

SIPOC diagram

discrepancies to current 'as is' process map

formation and briefing of project team

defining business case for project

problem statement

goal statement

project scope


Metrics may include:

key measures/attributes

sampling schedule for project

defect rate


Analyse may include:

statistical analysis of data

root cause analysis


use of various other problem solving/analysis tools


Improve may include:

generating and testing of improvements

selecting appropriate improvements

Control and standardise

Control and standardise may include:

documenting outcomes and procedures for standardisation

transferring ownership of improved process

Sampling schedule

Sampling schedule may include:

sampling frequency

type of sample/sample method

sample location/type

type of test/data to be collected

Process control strategy

Process control strategy may include:

degree of intervention/rules for resets

SPC tools to be used