Unit of competency Outline

Date retreived
23/07/2026 5:18 AM AWST

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Work within a constrained process

Work within a constrained process

Unit of competency
National Code
MSS403024A
State Code
WD523
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
02/05/2012
State Implementation and Classification
Approved Date
18/07/2012
Field of Education
030717 - Plant And Machine Operations
Original Release Date
18/07/2012
Nominal Hours
30
Description
This unit of competency covers the skills and knowledge required to apply the theory of constraints to a process which has a constraint.
Notes
Elements and Performance Criteria
1 Identify the system constraint (bottleneck)
  • 1.1 Identify desired output from process/system
  • 1.2 Determine throughput of process/system steps
  • 1.3 Identify capacity constrained resource (bottleneck)
  • 1.4 Confirm maximum/optimum throughput for this capacity constrained resource
2 Manage capacity constrained resource (drum)
  • 2.1 Determine required time buffers for capacity constrained resource
  • 2.2 Translate time buffer into physical buffers, as appropriate
  • 2.3 Establish required buffers
  • 2.4 Examine capacity constrained resource to ensure optimum use of capacity
3 Determine schedule based on capacity constrained resource
  • 3.1 Implement supply schedule appropriate for capacity constrained resource
  • 3.2 Determine delivery schedule based on capacity of capacity constrained resource
  • 3.3 Compare delivery schedule with externally required delivery rate and take appropriate action
4 Examine operation of system/process
  • 4.1 Determine throughput of process/system steps
  • 4.2 Identify any additional/new capacity constrained resource
  • 4.3 Take appropriate action
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
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
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
Constraint/capacity constrained resource
A capacity constrained resource refers to:
the step in a process or part of a system which limits the output of the entire system or process (colloquially known as a bottleneck)
Drum
The capacity constrained resource is often referred to as the drum, as its output provides the ‘drumbeat’ for the output of the entire system or process
Buffer
Buffer refers to:
the slack time required in the system to protect the capacity constrained resource (drum) against disruption (in a physical process this is usually represented by work in progress)
Optimum use of capacity
Optimum use of capacity refers to:
ensuring the capacity constrained resource is not diverted or prevented from producing at its limit
Supply schedule (‘rope’)
Supply schedule refers to:
ensuring the capacity constrained resource has what it needs when it needs it (often referred to as ‘the rope’ - the system which releases supply as needed)
Delivery schedule
Delivery schedule refers to:
what the system/process is actually able to deliver from the capacity constrained resource once it has been appropriately buffered and supplied
Appropriate action
Appropriate action may include:
advising customers and stakeholders of the actual production capacity
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:
identify capacity constrained resource
manage capacity constrained resource (drum)
determine schedule based on capacity constrained resource.
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 control/management
reports from supervisors/managers
case studies and scenarios to assess responses to contingencies
minutes of meetings and other records relevant to determining and dealing with the core conflict.
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 studies/scenarios (particularly for assessment of contingencies, improvement scenarios, and so on)
targeted questioning
reports from supervisors, peers and colleagues (third-party 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.
Replaced By
State Code National Code Title Type
BAK28 MSS403024 Work within a constrained process Unit of competency