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Evidence Guide: MSS404052 - Apply statistics to operational processes

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

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MSS404052 - Apply statistics to operational processes

What evidence can you provide to prove your understanding of each of the following citeria?

Collect process data

  1. Interpret sampling scheme.
  2. Obtain measurements in accordance with standard sampling procedures.
  3. Handle data in accordance with procedures.
Interpret sampling scheme.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Obtain measurements in accordance with standard sampling procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Handle data in accordance with procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Interpret data

  1. Plot data on appropriate control chart.
  2. Distinguish between random and non-random patterns of results.
  3. Identify results outside the control limits.
  4. Recognise situations requiring action.
  5. Take action in accordance with procedures.
  6. Determine cost of non-conformance.
Plot data on appropriate control chart.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Distinguish between random and non-random patterns of results.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify results outside the control limits.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Recognise situations requiring action.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Take action in accordance with procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine cost of non-conformance.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate control limits

  1. Consult relevant stakeholders to determine appropriate limits.
  2. Use relevant methods to calculate/revise control limits.
  3. Plot limits on control chart and complete other records in accordance with procedures.
  4. Explain impact of limit to relevant stakeholders.
Consult relevant stakeholders to determine appropriate limits.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Use relevant methods to calculate/revise control limits.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Plot limits on control chart and complete other records in accordance with procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain impact of limit to relevant stakeholders.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Collect process data

1.1

Interpret sampling scheme.

1.2

Obtain measurements in accordance with standard sampling procedures.

1.3

Handle data in accordance with procedures.

2

Interpret data

2.1

Plot data on appropriate control chart.

2.2

Distinguish between random and non-random patterns of results.

2.3

Identify results outside the control limits.

2.4

Recognise situations requiring action.

2.5

Take action in accordance with procedures.

2.6

Determine cost of non-conformance.

3

Calculate control limits

3.1

Consult relevant stakeholders to determine appropriate limits.

3.2

Use relevant methods to calculate/revise control limits.

3.3

Plot limits on control chart and complete other records in accordance with procedures.

3.4

Explain impact of limit to relevant stakeholders.

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Collect process data

1.1

Interpret sampling scheme.

1.2

Obtain measurements in accordance with standard sampling procedures.

1.3

Handle data in accordance with procedures.

2

Interpret data

2.1

Plot data on appropriate control chart.

2.2

Distinguish between random and non-random patterns of results.

2.3

Identify results outside the control limits.

2.4

Recognise situations requiring action.

2.5

Take action in accordance with procedures.

2.6

Determine cost of non-conformance.

3

Calculate control limits

3.1

Consult relevant stakeholders to determine appropriate limits.

3.2

Use relevant methods to calculate/revise control limits.

3.3

Plot limits on control chart and complete other records in accordance with procedures.

3.4

Explain impact of limit to relevant stakeholders.

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment and must include on two (2) or more occasions:

gathering, analysing and interpreting process data to support the control of processes and operations

applying specified sampling procedures

investigating the causes of variation in a process

communicating with other employees to obtain samples/data and to explain results and limits

calculating and plotting data and control limits

completing other required documentation.

Must provide evidence that demonstrates knowledge relevant to their job role sufficient to fulfil their job role independently, including:

purpose of sampling and measurement

sampling methods to be used

methods of calculating means, standard deviations and the like and their purpose in statistical control

concept of limits, including 1, 2, 3 and 6 sigma limits

types of control charts and their applications to different types of process/product and for different purposes

process causes of variation and typical cause types of non-random variation

non-process (e.g. measurement) causes of variation

recognition of stable and unstable processes

causes of stability/instability in the process

calculation of control limits/process capability and the applications of different control limits

the standard distribution curve and confidence limits.

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Competitive systems and practices include one or more of:

lean operations

agile operations

preventative and predictive maintenance approaches

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

5S

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.

Sampling schemes include one or more of:

sampling for attributes or sampling for variables

batch, continuous or custom made products

type of sample

size of sample

number of items/samples

number/type of measurements to be done on each sample

timing of sampling

location of sampling points

sampling equipment

measurement/testing equipment/methods.

Checking, analysing and storing data includes one or more of:

calculating means, ranges, mean of means and standard deviations (using appropriate calculation aids)

entering data into a software package

recording data either in writing or electronically

other required manipulations of the data.

Control charts include one or more of:

run

tally

mean/range

attributes

other relevant charts.

Variations include all of:

random variations for which no cause can be found

non-random variations for which a cause can be found and so the cause of the variation eliminated (also called identifiable cause, assignable cause or special cause)

non-random variations used to predict possible breaches of the control limits.

Limits include one or more of:

control limits (also referred to as process capability) within which the process will operate if it is 'under control'

appropriate limits: 1 sigma warning limits, 2 sigma warning limits, 3 sigma control limits, and 6 sigma limits.

Costs of non-conformance include one or more of:

reprocessing/rework

expediting

unplanned service

excess inventory

complaint handline

downtime

returns

scrap

labour costs

material costs

infrastructure costs/overhead

utility costs.

Procedures (written, verbal, visual, computer based, etc.) include one or any combination of:

work instructions

standard operating procedures (SOPs)

safe work method statements

formulas/recipes

batch sheets

temporary instructions

any similar instructions provided for the smooth running of the process.