Carrying out design of experiments (DOE)

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This standard covers the competencies required for carrying out design of experiments (DOE).  It involves applying the principles and process of design of experiments to the selected plant or process, which will require the plant or process being taken out of production to run the methodology.

You will need to calculate the correct sample size required and identify a suitable sampling plan to reduce any systematic errors.  You will be expected to determine the scope/parameters of the experiment and carry out the experiment within these parameters utilising the appropriate tools and techniques.  The results of the design of experiment will be recorded and analysed to identify areas where improvements to the process can be made.  You will also need to produce a report of the findings along with an action plan to ensure the improvements identified are implemented.

Your responsibilities will require you to comply with organisational policy and procedures for the activities undertaken, report any problems with the activities that you cannot solve or are outside your responsibility to the relevant authority.  You will need to ensure that all sampling is carried out correctly and the necessary job/task documentation is completed accurately and legibly.  You will be expected to take full responsibility for your own actions within the activity and for the quality and accuracy of the work that you produce.

Your underpinning knowledge will provide a good understanding of design of experiments and provide an informed approach to the techniques and procedures used.  You will need to understand the principles and application of design of experiments in adequate depth to provide a sound basis for carrying out the activities to the required criteria.

Applying safe working practices will be a key issue throughout.

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1. work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
2. select an appropriate process on which to carry out the design of experiment and obtain all the necessary data
3. determine the scope/parameters of the experiment
4. utilise sample size selection to ensure the statistical validity of the experiment and calculate the correct sample size required for the experiment
5. estimate the resources and expected benefits for the design of experiment undertaken
6. identify a suitable sampling plan to reduce systematic errors
7. carry out a design of experiment within an improvement project utilising the appropriate tools and techniques
8. record the results of the design of experiment in the appropriate format
9. analyse the data gathered and identify areas where improvements to the process can be made
10. produce a design of experiment report which includes an action plan to ensure the improvements are implemented

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1. how to work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
2. why we need to use design of experiments and how this benefits an improvement project
3. how to determine the scope of an experiment
4. how to carry out a design of experiment project and the tools and techniques used
5. where to obtain the data required to carry out the design of experiment
6. how to calculate the sample size to be used in the design of experiment
7. what is meant by Alpha risk and Beta risk
8. how to use the data obtained to calculate: mean, median, mode, standard deviation, range and variance
9. how to calculate and graphically display main effects and interactions
10. what is the meaning of a population and a sample in terms of the design of experiment
11. how to design a suitable array for the designs to include full factorial, 2^k factorial and fractional
12. how to design an array to assess the selected interactions from the designs to include full factorial, 2^k factorial and fractional
13. the extent of your own authority and whom you should report to, in the event of problems that you cannot resolve

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1. Identify for the experiment undertaken:

   1. a suitable Alpha risk level
   2. a suitable Delta that needs to be observed
   3. a suitable Beta level

2. Determine the correct experimental design to use from one of the following:

   1. full factorial
   2. 2^k factorial
   3. fractional factorial

3. Calculate and produce graphs for the following:

   1. main effects
   2. interactions

4. Document the resources required to include:

   1. financial
   2. time scales
   3. manpower
   4. plant/equipment
   5. materials

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3

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2028

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Current

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Original

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Enginuity

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SEMBIT420

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Associate Professionals and Technical Occupations, Business and Finance Associate Professionals, Business Management, Business, Administration and Law.

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2127

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Engineering; business; improvement; techniques; design; experiments; DOE; produce graphs; factorial; resources; risk

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