SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Demonstrate an understanding of statistical process control 
SAQA US ID UNIT STANDARD TITLE
263395  Demonstrate an understanding of statistical process control 
ORIGINATOR
SGB Generic Management 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 03 - Business, Commerce and Management Studies Generic Management 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5  12 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
Learners accredited with this Unit Standard will understand and be able to use the various statistical concepts to conduct/perform statistical process control. They will also learn about sampling techniques to gather data for the purpose of compiling and interpreting charts.

Learners credited with this standard will be able to:
  • Explain statistical concepts pertaining to statistical process control.
  • Explain the importance and use of sampling of product characteristics to construct control charts.
  • Construct and interpret charts. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that the learner has the following knowledge and skills:
  • Communication at NQF Level 4.
  • Mathematical Literacy at NQF Level 4. 

  • UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Explain statistical concepts pertaining to statistical process control. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Variation is explained within a process context. 

    ASSESSMENT CRITERION 2 
    Process stability is explained in terms of its importance for implementation of statistical process control. 

    ASSESSMENT CRITERION 3 
    Process capability is explained in terms of control and tolerance bands. 

    ASSESSMENT CRITERION 4 
    An explanation is given of measures of spread and central tendency. 

    ASSESSMENT CRITERION 5 
    Common and special causes of variation in processes are described for corrective/preventive action. 

    ASSESSMENT CRITERION 6 
    Attributes, variables and related control charts are discussed in terms of their scope of applicaton to identify process problems. 
    ASSESSMENT CRITERION RANGE 
    These include variable and attribute control charts (average and range, np,p,c,u), scatter diagrams, measels charts, histograms, pareto analysis:
  • np: Number nonconforming within one subgroup.
  • p: Fraction nonconforming within one subgroup.
  • c: Number of non-conformances within one subgroup.
  • u: Non-conformances per unit within one subgroup.
     

  • SPECIFIC OUTCOME 2 
    Sample product characteristics in order to construct control charts. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Sampling methodologies are analysed in order to choose the most appropriate method to perform a specific task. 

    ASSESSMENT CRITERION 2 
    A Sampling plan is implemented according to sampling methodology. 

    ASSESSMENT CRITERION 3 
    Data is collected from relevant sources in order to determine base values. 

    ASSESSMENT CRITERION 4 
    Data is captured in preparation for the construction of a chart. 
    ASSESSMENT CRITERION RANGE 
    Captured includes both measured and recorded.
     

    SPECIFIC OUTCOME 3 
    Construct and interpret charts. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Process averages and control limits are calculated in order to construct the chart. 

    ASSESSMENT CRITERION 2 
    The appropriate control chart is constructed in order to analyse the process variation. 

    ASSESSMENT CRITERION 3 
    Trends and/or points in 'out-of-control' situations are identified to determine root cause/s for corrective and preventive action. 

    ASSESSMENT CRITERION 4 
    Process capability is calculated based on control limits and tolerance bands. 

    ASSESSMENT CRITERION 5 
    A report on process stability, suitability and capability is prepared according to requirements and within an ethical framework. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • An individual wishing to be assessed (including through RPL) against this Unit Standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, or an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Anyone assessing a learner against this Unit Standard must be registered as an assessor with the relevant ETQA or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this Unit Standard or assessing this Unit Standard must be accredited as a provider with the relevant ETQA or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Moderation of assessment will be conducted by the relevant ETQA at its discretion. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • Statistical concepts.
  • Sampling methodologies.
  • Chart construction. 

  • UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems in which responses display that responsible decisions using critical and creative thinking have been made when:
  • Using sampling methodologies to obtain data.
  • Interpreting data to construct charts. 

  • UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team, group, organisation, community to:
  • Collect and collate data for interpretation. 

  • UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself and one's activities responsively and effectively when:
  • Using sampling methodologies to obtain and collate data.
  • Interpret data.
  • Construct charts. 

  • UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information to:
  • Interpret data.
  • Construct chart. 

  • UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the modes of oral and / or written presentation to:
  • Collect and collate data.
  • Prepare report. 

  • UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  66189   National Certificate: Quality Management Systems  Level 5  Level TBA: Pre-2009 was L5  Reregistered  2023-06-30  SERVICES 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.