Unit 36: Statistical Process Control

Assignment 2

Process capability against a given product or component quality requirement using modified control chart limits and analyse types of variation within a process and record information on that variation

Grading Criteria
Pass   Assessed in Assignment   Merit   Assessed in Assignments   Distinction   Assessed in Assignments
1.1   1   M1   1, 2   D1   1
1.2   1   M2   1, 2   D2   2
1.3   1   M3a   1   D3   1
1.4   1   M3b   2
2.1   1
2.2   1
2.3   1
3.1   2
3.2   2
3.3   2
4.1   2
4.2   2

Assignment Author IV Signature
Owen Latham S Johnston

PASS grade must be achieved:

Unit 36: Outcomes Learner has demonstrated the ability to: Source of evidence

Outcome 3

Be able to evaluate process capability against a given
product or component quality requirement using
modified control chart limits

LO3.1: describe process capability
Task 1

LO3.2: investigate the purpose of modified control chart limits
Task 2

LO3.3: evaluate processes against a given quality requirement
Task 3, Q1

Outcome 4

Be able to analyse types of variation within a process and record information on that variation

LO4.1 analyse a range of processes for types of variation
Task 3, Q2

LO4.2 record information on variation from a process
Task 3, Q3

Merit criteria that may be achieved:

Merit Grade Descriptors Indicative Characteristics Contextualisation Source of evidence
M1

Identify and apply strategies to find appropriate solutions

Effective judgements have been made

Examples used to illustrate depth of understanding are sufficiently detailed to demonstrate knowledge and research undertaken
Tasks 3 Q1
M2

Select/design and apply appropriate methods/techniques

A range of methods and techniques have been applied

Demonstrate a wide range of literature research has taken place during the completion of the assignment
All Tasks and References
M3a

Present and communicate appropriate findings
The communication is appropriate for familiar and unfamiliar audiences and appropriate media have been used

Throughout the report, the solutions are coherently presented using technical language appropriately and in a professional manner

All Tasks

Distinction criteria that may be achieved:

Distinction Grade Descriptors Indicative Characteristics Contextualisation Source of evidence
D2

Take responsibility for managing and organising activities

The importance of interdependence has been recognised and achieved

Deliver a presentation of no longer than 10 minutes and not less than 5 minutes on the advantages and disadvantages of Process Capability when applied to statistical process control methodology as opposed to other quality system

Task 1

General Information

All submissions to be electronic in MS Word format with a minimum of 20 typed words. All answers must be clearly identified as to which task and question they refer to. All work must be submitted through HE Learn zone.

Task 1 – Learning Outcome 3.1
Describe process capability

The term Process Capability is used within the quality control methodology
In a presentation of between 5 and 10 minutes (date to be determined) define the meaning of the term and its application, use examples to illustrate your point as appropriate

Task 2 – Learning Outcome 3.2
Investigate the purpose of modified control chart limits

Control charts are used within the quality sampling methodology; explore their purpose and function when modified. Use examples to illustrate your point as appropriate (300 words)

Task 3 – Learning Outcomes 3.3, 4.1, and 4.2
3.3 Evaluate processes against a given quality requirement
4.1 Analyse a range of processes for types of variation
4.2 Record information on variation from a process

A customer requires that a component shaft is manufactured with a diameter of 50mm ±0.01mm

Your company has two processes one is a precision grinding machine with a standard deviation of 0.0011mm, the other is a CNC machine that has a standard deviation of 0.0035mm

Evaluate which of the processes would be capable of producing the component within the customer’s specification. Use appropriate calculations and control charts to support your statement.
(300 words + calculations)

Define and analyse the types of variations that could be attributed to them.
(350 words)

Record the variations you would expect to witness during the manufacturing operation. Use appropriate tables, calculations and control charts to support your assumptions.
(300 words plus calculation)

End of assessment brief